这道题用数学排列组合知识怎么做? 数学里排列组合知识的 C（5，3）就是用excel函数com...
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\uff08A)240 (B)180 (C)120 (D)60
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\u540c\u6837\u5f97\u51fa\u5171\u2474\u00d7\u2475\u00d7\u2476=240\u79cd\u3002
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\u7b2c\u4e8c\u7c7b\uff1a\u8fd9\u4e24\u4e2a\u4eba\u90fd\u53bb\u5f53\u8f66\u5de5\uff0cC\uff085,4\uff09\u00d7C\uff082,2\uff09\u00d7C\uff084,2\uff09=30\u79cd\uff1b
\u7b2c\u4e09\u7c7b\uff1a\u8fd9\u4e24\u4eba\u65e2\u4e0d\u53bb\u5f53\u94b3\u5de5\uff0c\u4e5f\u4e0d\u53bb\u5f53\u8f66\u5de5C\uff085,4\uff09\u00d7C\uff084,4\uff09=5\u79cd\u3002
\u7b2c\u56db\u7c7b\uff1a\u8fd9\u4e24\u4e2a\u4eba\u4e00\u4e2a\u53bb\u5f53\u94b3\u5de5\u3001\u4e00\u4e2a\u53bb\u5f53\u8f66\u5de5\uff0cC\uff082,1\uff09\u00d7C\uff085,3\uff09\u00d7C\uff084,3\uff09=80\u79cd\uff1b
\u7b2c\u4e94\u7c7b\uff1a\u8fd9\u4e24\u4e2a\u4eba\u4e00\u4e2a\u53bb\u5f53\u94b3\u5de5\u3001\u53e6\u4e00\u4e2a\u4e0d\u53bb\u5f53\u8f66\u5de5\uff0cC\uff082,1\uff09\u00d7C\uff085,3\uff09\u00d7C\uff084,4\uff09=20\u79cd\uff1b
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\u56e0\u800c\u5171\u6709185\u79cd\u3002
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\u65b9\u6cd5\u4e8c\uff1a
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\u56e0\u800c\u4e00\u5171\u670956-4+1=53\u4e2a\u3002
\u3010\u4f8b17\u3011 \u516d\u4eba\u6392\u6210\u4e00\u6392\uff0c\u8981\u6c42\u7532\u5728\u4e59\u7684\u524d\u9762\uff0c\uff08\u4e0d\u4e00\u5b9a\u76f8\u90bb\uff09\uff0c\u5171\u6709\u591a\u5c11\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5? \u5982\u679c\u8981\u6c42\u7532\u4e59\u4e19\u6309\u4ece\u5de6\u5230\u53f3\u4f9d\u6b21\u6392\u5217\u5462?
\u5206\u6790\uff1a\uff08\u4e00\uff09\u5b9e\u9645\u4e0a\uff0c\u7532\u5728\u4e59\u7684\u524d\u9762\u548c\u7532\u5728\u4e59\u7684\u540e\u9762\u4e24\u79cd\u60c5\u51b5\u5bf9\u79f0\uff0c\u5177\u6709\u76f8\u540c\u7684\u6392\u6cd5\u6570\u3002\u56e0\u800c\u6709A(6\uff0c6)/2=360\u79cd\u3002
\uff08\u4e8c\uff09\u5148\u8003\u8651\u516d\u4eba\u5168\u6392\u5217A(6,6)\u79cd\uff1b\u5176\u6b21\u7532\u4e59\u4e19\u4e09\u4eba\u5b9e\u9645\u4e0a\u53ea\u80fd\u6309\u7167\u4e00\u79cd\u987a\u5e8f\u7ad9\u4f4d\uff0c\u56e0\u800c\u524d\u9762\u7684\u6392\u6cd5\u6570\u91cd\u590d\u4e86A(3,3)\u79cd\uff0c \u2234 \u6709A(6\uff0c6)/A(3,3)=120\u79cd\u3002
\u3010\u4f8b18\u30115\u75374\u5973\u6392\u6210\u4e00\u6392\uff0c\u8981\u6c42\u7537\u751f\u5fc5\u987b\u6309\u4ece\u9ad8\u5230\u77ee\u7684\u987a\u5e8f\uff0c\u5171\u6709\u591a\u5c11\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5?
\u5206\u6790\uff1a\uff08\u4e00\uff09\u9996\u5148\u4e0d\u8003\u8651\u7537\u751f\u7684\u7ad9\u4f4d\u8981\u6c42\uff0c\u5171A\uff089,9\uff09\u79cd\uff1b\u7537\u751f\u4ece\u5de6\u81f3\u53f3\u6309\u4ece\u9ad8\u5230\u77ee\u7684\u987a\u5e8f\uff0c\u53ea\u6709\u4e00\u79cd\u7ad9\u6cd5\uff0c\u56e0\u800c\u4e0a\u8ff0\u7ad9\u6cd5\u91cd\u590d\u4e86A(5,5)\u6b21\u3002\u56e0\u800c\u6709A(9,9,)/A(5,5,)=9\u00d78\u00d77\u00d76=3024\u79cd
\u82e5\u7537\u751f\u4ece\u53f3\u81f3\u5de6\u6309\u4ece\u9ad8\u5230\u77ee\u7684\u987a\u5e8f\uff0c\u53ea\u6709\u4e00\u79cd\u7ad9\u6cd5\uff0c \u540c\u7406\u4e5f\u67093024\u79cd\uff0c\u7efc\u4e0a\uff0c\u67096048\u79cd\u3002
\uff08\u4e8c\uff09\u6309\u7167\u63d2\u7a7a\u7684\u65b9\u5f0f\u8fdb\u884c\u601d\u8003\u3002
\u7b2c\u4e00\u6b65\uff1a4\u4e2a\u5973\u751f\u5148\u57289\u4e2a\u4f4d\u7f6e\u4e2d\u9009\u62e94\u4e2a\uff0c\u4e3aA(9,4)\u79cd\u65b9\u5f0f\uff1b
\u7b2c\u4e8c\u6b65\uff1a\u7537\u751f\u7ad9\u5269\u4e0b\u7684\u4f4d\u7f6e\uff0c\u56e0\u4e3a\u5fc5\u987b\u4ece\u9ad8\u5230\u77ee\u7684\u987a\u5e8f\uff0c\u6ca1\u6709\u89c4\u5b9a\u65b9\u5411\uff0c\u6240\u4ee5\u67092\u79cd\uff1b
\u7efc\u4e0a\uff0c\u603b\u7684\u7ad9\u6cd5\u6570\u6709A(9,4)\u00d72=6048\u79cd\u3002
\u3010\u4f8b19\u3011 \u4e09\u4e2a\u76f8\u540c\u7684\u7ea2\u7403\u548c\u4e24\u4e2a\u4e0d\u540c\u7684\u767d\u7403\u6392\u6210\u4e00\u884c\uff0c\u5171\u6709\u591a\u5c11\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5?
\u5206\u6790\uff1a\u5148\u8ba4\u4e3a\u4e09\u4e2a\u7ea2\u7403\u4e92\u4e0d\u76f8\u540c\uff0c\u5171A\uff085,5\uff09=120\u79cd\u65b9\u6cd5\u3002
\u800c\u7531\u4e8e\u4e09\u4e2a\u7ea2\u7403\u6240\u5360\u4f4d\u7f6e\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\uff0c\u5171A\uff083,3\uff09=6\u53d8\u5316\uff0c\u56e0\u800c\u5171A\uff085,5\uff09/A\uff083,3\uff09=20\u79cd\u3002
\u516c\u5f0fP\u662f\u6307\u6392\u5217\uff0c\u4eceN\u4e2a\u5143\u7d20\u53d6R\u4e2a\u8fdb\u884c\u6392\u5217\uff08\u5373\u6392\u5e8f\uff09\u3002\uff08P\u662f\u65e7\u7528\u6cd5\uff0c\u6559\u6750\u4e0a\u591a\u7528A\uff0cArrangement)
\u516c\u5f0fC\u662f\u6307\u7ec4\u5408\uff0c\u4eceN\u4e2a\u5143\u7d20\u53d6R\u4e2a\uff0c\u4e0d\u8fdb\u884c\u6392\u5217\uff08\u5373\u4e0d\u6392\u5e8f\uff09\u3002
\u6321\u677f\u7684\u4f7f\u7528
\u3010\u4f8b20\u301110\u4e2a\u540d\u989d\u5206\u914d\u5230\u516b\u4e2a\u73ed\uff0c\u6bcf\u73ed\u81f3\u5c11\u4e00\u4e2a\u540d\u989d\uff0c\u95ee\u6709\u591a\u5c11\u79cd\u4e0d\u540c\u7684\u5206\u914d\u65b9\u6cd5?
\u5206\u6790\uff1a\u628a10\u4e2a\u540d\u989d\u770b\u6210\u5341\u4e2a\u5143\u7d20\uff0c\u5728\u8fd9\u5341\u4e2a\u5143\u7d20\u4e4b\u95f4\u5f62\u6210\u7684\u4e5d\u4e2a\u7a7a\u4e2d\uff0c\u9009\u51fa\u4e03\u4e2a\u4f4d\u7f6e\u653e\u7f6e\u6863\u677f\uff0c\u5219\u6bcf\u4e00\u79cd\u653e\u7f6e\u65b9\u5f0f\u5c31\u76f8\u5f53\u4e8e\u4e00\u79cd\u5206\u914d\u65b9\u5f0f\u3002\u56e0\u800c\u517136\u79cd\u3002
\u533a\u522b\u4e0e\u8054\u7cfb
\u6240\u6709\u7684\u6392\u5217\u90fd\u53ef\u4ee5\u770b\u4f5c\u662f\u5148\u53d6\u7ec4\u5408\uff0c\u518d\u505a\u5168\u6392\u5217\uff1b\u540c\u6837\uff0c\u7ec4\u5408\u5982\u8865\u5145\u4e00\u4e2a\u9636\u6bb5\uff08\u6392\u5e8f\uff09\u53ef\u8f6c\u5316\u4e3a\u6392\u5217\u95ee\u9898\u3002
\u3010\u4f8b21\u3011\u7528\u6570\u5b570\uff0c1\uff0c2\uff0c3\uff0c4\uff0c5\u7ec4\u6210\u6ca1\u6709\u91cd\u590d\u6570\u5b57\u7684\u56db\u4f4d\u6570\uff0c
\u2474\u53ef\u7ec4\u6210\u591a\u5c11\u4e2a\u4e0d\u540c\u7684\u56db\u4f4d\u6570?
\u2475\u53ef\u7ec4\u6210\u591a\u5c11\u4e2a\u4e0d\u540c\u7684\u56db\u4f4d\u5076\u6570
\u2476\u53ef\u7ec4\u6210\u591a\u5c11\u4e2a\u80fd\u88ab3\u6574\u9664\u7684\u56db\u4f4d\u6570?
\u5206\u6790\uff1a\u2474\u6709A\uff086,4\uff09-A\uff085,3\uff09=300\u4e2a\u3002
\u2475\u5206\u4e3a\u4e24\u7c7b\uff1a0\u5728\u672b\u4f4d\uff0c\u5219\u6709A\uff085,3\uff09=60\u79cd\uff1a0\u4e0d\u5728\u672b\u4f4d\uff0c\u5219\u6709C\uff082,1\uff09\u00d7A\uff085,3\uff09-C\uff082,1\uff09\u00d7A\uff084,2\uff09=96\u79cd\u3002
\u2234 \u517160+96=156\u79cd\u3002
\u2476\u5148\u628a\u56db\u4e2a\u76f8\u52a0\u80fd\u88ab3\u6574\u9664\u7684\u56db\u4e2a\u6570\u4ece\u5c0f\u5230\u5927\u5217\u4e3e\u51fa\u6765\uff0c\u5373\u5148\u9009
0\uff0c1\uff0c2\uff0c3
0\uff0c1\uff0c3\uff0c5
0\uff0c2\uff0c3\uff0c4
0\uff0c3\uff0c4\uff0c5
1\uff0c2\uff0c4\uff0c5
\u5b83\u4eec\u6392\u5217\u51fa\u6765\u7684\u6570\u4e00\u5b9a\u53ef\u4ee5\u88ab3\u6574\u9664\uff0c\u518d\u6392\u5217\uff0c\u6709\uff1a4\u00d7[A\uff084,4\uff09-A\uff083,3\uff09]+A\uff084,4\uff09=96\u79cd\u3002
\u5206\u7ec4\u95ee\u9898
\u3010\u4f8b22\u3011 5\u540d\u5b66\u751f\u5206\u914d\u52304\u4e2a\u4e0d\u540c\u7684\u79d1\u6280\u5c0f\u7ec4\u53c2\u52a0\u6d3b\u52a8\uff0c\u6bcf\u4e2a\u79d1\u6280\u5c0f\u7ec4\u81f3\u5c11\u6709\u4e00\u540d\u5b66\u751f\u53c2\u52a0\uff0c\u5219\u5206\u914d\u65b9\u6cd5\u5171\u6709\u591a\u5c11\u79cd\uff1f
\u5206\u6790\uff1a\uff08\u4e00\uff09\u5148\u628a5\u4e2a\u5b66\u751f\u5206\u6210\u4e8c\u4eba\uff0c\u4e00\u4eba\uff0c\u4e00\u4eba\uff0c\u4e00\u4eba\u5404\u4e00\u7ec4\u3002
\u5176\u4e2d\u6d89\u53ca\u5230\u5e73\u5747\u5206\u6210\u56db\u7ec4\uff0c\u6709C\uff085,3\uff09=10\u79cd\u5206\u7ec4\u65b9\u6cd5\u3002\u53ef\u4ee5\u770b\u62104\u4e2a\u677f\u4e09\u4e2a\u677f\u4e0d\u7a7a\u7684\u9694\u677f\u6cd5\u3002
\uff08\u4e8c\uff09\u518d\u8003\u8651\u5206\u914d\u5230\u56db\u4e2a\u4e0d\u540c\u7684\u79d1\u6280\u5c0f\u7ec4\uff0c\u6709A\uff084,4\uff09=24\u79cd\uff0c
\u7531\uff08\u4e00\uff09\uff08\u4e8c\uff09\u53ef\u77e5\uff0c\u517110\u00d724=240\u79cd\u3002
\u51e0\u4f55\u95ee\u9898
\u3010\u4f8b23\u3011\u67d0\u533a\u67097\u6761\u5357\u5317\u5411\u8857\u9053\uff0c5\u6761\u4e1c\u897f\u5411\u8857\u9053\uff08\u5982\u53f3\u56fe\uff09
\u2474\u56fe\u4e2d\u5171\u6709\u591a\u5c11\u4e2a\u77e9\u5f62\uff1f
\u2475\u4eceA\u70b9\u5230B\u70b9\u6700\u8fd1\u7684\u8d70\u6cd5\u6709\u591a\u5c11\u79cd\uff1f
\u5206\u6790\uff1a\u2474\u57287\u6761\u7ad6\u7ebf\u4e2d\u4efb\u90092\u6761\uff0c5\u6761\u6a2a\u7ebf\u4e2d\u4efb\u90092\u6761\uff0c\u8fd9\u68374\u6761\u7ebf
\u53ef\u7ec4\u62101\u4e2a\u77e9\u5f62\uff0c\u6545\u53ef\u7ec4\u6210\u77e9\u5f62C\uff087,2\uff09\u00b7C\uff085,2\uff09=210\u4e2a
\u2475\u6bcf\u6761\u4e1c\u897f\u5411\u7684\u8857\u9053\u88ab\u5206\u62104\u6bb5\uff0c\u6bcf\u6761\u5357\u5317\u5411\u7684\u8857\u9053\u88ab\u5206\u62106\u6bb5\uff0c\u4eceA\u5230B\u6700\u77ed\u7684\u8d70\u6cd5\uff0c\u65e0\u8bba\u600e\u6837\u8d70\uff0c\u4e00\u5b9a\u5305\u62ec10\u6bb5\uff0c\u5176\u4e2d6\u6bb5\u65b9\u5411\u76f8\u540c\uff0c\u53e6\u59164\u6bb5\u65b9\u5411\u76f8\u540c\uff0c\u6bcf\u79cd\u8d70\u6cd5\uff0c\u5373\u662f\u4ece10\u6bb5\u4e2d\u9009\u51fa6\u6bb5\uff0c\u8fd96\u6bb5\u662f\u8d70\u4e1c\u897f\u65b9\u5411\u7684\uff0c\u5171\u6709C\uff0810,6\uff09=C\uff0810,4\uff09=210\u79cd\u8d70\u6cd5\uff08\u540c\u6837\u53ef\u4ee5\u4ece10\u6bb5\u4e2d\u9009\u51fa4\u6bb5\u8d70\u5357\u5317\u65b9\u5411\uff0c\u6bcf\u4e00\u79cd\u9009\u6cd5\u5373\u662f1\u79cd\u8d70\u6cd5\uff09\u3002\u6240\u4ee5\u5171\u6709210\u79cd\u8d70\u6cd5\u3002
C(5,3)=(5\u00d74\u00d73)/(3\u00d72\u00d71)=10
\u4ecea\u3001b\u3001c\u3001d\u3001e\u8fd95\u4e2a\u5143\u7d20\u4e2d\u4efb\u53d63\u4e2a\u7684\u7ec4\u5408\u670910\u4e2a\uff1aabc\uff0cabd\uff0cabe\uff0cacd\uff0cace\uff0cade\uff0cbcd\uff0cbce\uff0cbde\uff0ccde\u3002
故有1800种方法。
（2）5房空1房，有C（5，1）。
6人住4房：有3、1、1、1；此时有C（6，3），后全排列A（4，4）
有2、2、1、1；此时有C（6，2）C（4，2）/2，后全排列A（4，4）
共有1560种方法。
注：A（p，q）中p表示下标，q表示上标。
第一问，
先分组，其中有一组两个人，所以为C(6,2)
然后将5组作全排列，A55
所以答案=A55xC62=1800种
第二问
根据题意即将6个人分4组，需分类讨论。
其中一组3个人，其它三组1个人。即C63
其中两组2个人，其它两组1个人，即(C62xC42)/2
然后再将4组全排列A44
即可得
(C63+(C62xC42)/2)xA44=1560种
望采纳
谢谢
有任何不懂
请加好友
一一解答
绛旓細绗竴闂紝鍏堝垎缁勶紝鍏朵腑鏈変竴缁勪袱涓汉锛屾墍浠ヤ负C(6,2)鐒跺悗灏5缁勪綔鍏鎺掑垪锛孉55 鎵浠ョ瓟妗=A55xC62=1800绉 绗簩闂 鏍规嵁棰樻剰鍗冲皢6涓汉鍒4缁勶紝闇鍒嗙被璁ㄨ銆傚叾涓竴缁3涓汉锛屽叾瀹冧笁缁1涓汉銆傚嵆C63 鍏朵腑涓ょ粍2涓汉锛屽叾瀹冧袱缁1涓汉锛屽嵆(C62xC42)/2 鐒跺悗鍐嶅皢4缁勫叏鎺掑垪A44 鍗冲彲寰 (C63+(C62xC42)/2...
绛旓細1. 棣栧厛锛屼粠1-33涓暟瀛椾腑閫夊嚭6涓暟銆傝繖鏄竴涓粠33涓暟涓夊嚭6涓暟鐨勭粍鍚闂銆傚彲浠浣跨敤缁勫悎鏁板叕寮 $C_{n}^{m}=\frac{n!}{m!(n-m)!}$ 鏉ヨ绠椼傚洜姝わ紝浠1-33涓暟瀛椾腑閫夊嚭6涓暟鐨勯夋硶鎬绘暟涓 $C_{33}^{6}=\frac{33!}{6!(33-6)!}=33,649,449$ 绉嶃2. 鎺ヤ笅鏉ワ紝闇瑕佽...
绛旓細1銆佺浉閭婚棶棰樻崋缁戞硶锛氶鐩腑瑙勫畾鐩搁偦鐨勫嚑涓厓绱犳崋缁戞垚涓涓粍锛屽綋浣滀竴涓ぇ鍏冪礌鍙備笌鎺掑垪銆2銆佺浉绂婚棶棰樻彃绌烘硶锛氬厓绱犵浉绂伙紙鍗充笉鐩搁偦锛夐棶棰橈紝鍙厛鎶婃棤浣嶇疆瑕佹眰鐨勫嚑涓厓绱犲叏鎺掑垪锛屽啀鎶婅瀹氱殑鐩哥鐨勫嚑涓厓绱犳彃鍏ヤ笂杩板嚑涓厓绱犵殑绌轰綅鍜屼袱绔3銆佸畾搴忛棶棰樼缉鍊嶆硶锛氬湪鎺掑垪闂涓檺鍒舵煇鍑犱釜鍏冪礌蹇呴』淇濇寔涓瀹氱殑椤哄簭锛...
绛旓細鍏朵竴鏄湅闂鏄湁搴忕殑杩樻槸鏃犲簭鐨?鏈夊簭鐢ㄢ滄帓鍒椻,鏃犲簭鐢ㄢ滅粍鍚堚; 鍏朵簩鏄湅闂闇瑕佸垎绫昏繕鏄渶瑕佸垎姝?鍒嗙被鐢ㄢ滃姞娉曗,鍒嗘鐢ㄢ滀箻娉曗. 鍒嗙被:鈥滃仛涓浠朵簨,瀹屾垚瀹冨彲浠ユ湁n绫绘柟娉曗,杩欐槸瀵瑰畬鎴愯繖浠朵簨鐨勬墍鏈夊姙娉曠殑涓涓垎绫.鍒嗙被鏃,棣栧厛瑕佹牴鎹棶棰樼殑鐗圭偣纭畾涓涓傚悎浜庡畠鐨勫垎绫绘爣鍑,鐒跺悗鍦ㄨ繖涓 鏍囧噯涓嬭繘琛屽垎绫;...
绛旓細缁冧範涓庡弽鎬濓細澶氬仛缁冧範棰樻槸鎻愰珮瑙ｉ鑳藉姏鐨勬湁鏁堥斿緞銆傛瘡鍋氬畬涓閬撻鍚庯紝閮藉簲璇ュ弽鎬濊В棰樿繃绋嬩腑鐨勬濊矾鍜屾柟娉曪紝鎬荤粨缁忛獙鏁欒锛屼互渚垮湪鏈潵閬囧埌绫讳技闂鏃惰兘澶熸洿蹇В鍐炽傛讳箣锛岄氳繃涓婅堪鎶宸х殑搴旂敤锛屽彲浠ユ湁鏁堟彁楂樿В鍐虫帓鍒楃粍鍚堥棶棰樼殑鑳藉姏銆傞渶瑕佹敞鎰忕殑鏄紝杩欎簺鎶宸у苟闈炲绔嬩娇鐢紝鑰屾槸鍦ㄨВ棰樿繃绋嬩腑鏍规嵁闂鐨勭壒鐐圭伒娲昏繍鐢ㄣ
绛旓細浠1鍒10缁勬垚鏁板瓧姣忎笁涓竴缁勫彲浠ョ粍鎴120缁勩傝В棰樿繃绋嬶細10閫3 10脳9脳8梅锛1脳2脳3锛=120缁 杩欓亾棰樼敤鍒颁簡鏁板涓殑鎺掑垪缁勫悎銆
绛旓細浣跨敤楂樹腑鏁板鎺掑垪缁勫悎鐨鐭ヨ瘑瑙ｉ閫氬父娑夊強浠ヤ笅鍑犱釜姝ラ锛1. **鐞嗚В棰樻剰**锛氶鍏堣浠旂粏闃呰棰樼洰锛岀悊瑙ｉ鐩姹傝В鐨勬槸浠涔堥棶棰橈紝浠ュ強棰樼洰涓粰鍑虹殑鏉′欢銆2. **鍒嗙被璁ㄨ**锛氭牴鎹棰樼洰鐨鏉′欢锛屽皢闂鍒嗙被璁ㄨ銆備緥濡傦紝濡傛灉娑夊強鍒版帓鍒楋紝鍒欓渶瑕佽冭檻鏄惁瑕佹眰椤哄簭锛涘鏋滄秹鍙婂埌缁勫悎锛屽垯涓嶉渶瑕佽冭檻椤哄簭銆3. **搴旂敤...
绛旓細瑙ｅ喅鎺掑垪缁勫悎闂閫氬父閬靛惊浠ヤ笅姝ラ锛氱悊瑙棰樼洰瑕佹眰锛氶鍏堣浠旂粏闃呰棰樼洰锛屽紕娓呮鏄渶瑕佹壘鍑烘墍鏈夊彲鑳界殑鎺掑垪杩樻槸缁勫悎锛屼互鍙婃槸鍚︽湁閲嶅鍏冪礌鎴栫壒瀹氱殑闄愬埗鏉′欢銆傜‘瀹氭荤殑鍏冪礌鏁伴噺锛氱‘瀹氬彲渚涢夋嫨鐨勬诲厓绱犳暟閲忥紝杩欐槸璁＄畻鎺掑垪缁勫悎鐨鍩虹銆傜‘瀹氶渶瑕侀夋嫨鐨勫厓绱犳暟閲忥細鏍规嵁棰樼洰瑕佹眰锛岀‘瀹氶渶瑕佷粠鎬诲厓绱犱腑閫夋嫨澶氬皯涓厓绱犮傝冭檻閲嶅...
绛旓細鈶 姹傦紝闈炶礋鏁存暟瑙ｏ細绛旓細C(10, 2) = 45 涓庣涓棰樹笉鍚岋紝xyz鍙互鍙栭浂鍊硷紝寰堝鍚屽浼氱悊鎵褰撶劧鍦板啓C(9, 2)锛岃涓烘妸绔偣绠椾笂灏辫浜嗐備絾闇瑕佽冭檻鍒帮紝xyz鍧囧彲鍙栭浂鍊硷紝C(9, 2)蹇界暐浜唜=0锛寉=0锛宑=0鐨勬儏鍐点傚洜姝ゆ垜浠仛涓姝ュ彉鎹細x+y+z=8 ⇔ (x+1) + (y+1) + (z+1)...
绛旓細涓綅鏄0锛1脳5脳4脳3脳2脳1=120涓備釜浣嶆槸1--4鐨勬椂鍊欙紝鍗佷綅鍒嗗埆鏈4銆3銆2銆1绉嶉夋嫨锛涢浣嶄笉鑳戒负0锛屾湁3绉嶉夋嫨銆傛墍浠ユ槸锛3脳3脳2脳1脳锛4+3+2+1)=180涓120+180=300涓 鍗充釜浣嶆暟瀛楀皬浜庡崄浣嶆暟瀛楃殑鍏辨湁300涓 銆
