有若干人,每人任意出一个0至100之间的数字,问你,这些数的平均数的三分之一是多少? 写一个1-100的整数，测试群体是一个班级，答案是全班平均数...
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\u539f\u56e0\uff1a\u5f88\u7b80\u5355\uff0c\u5047\u8bbe\u6240\u6709\u4eba\u90fd\u586b100\uff0c\u90a3\u4e48\u5e73\u5747\u6570\u7684\u4e00\u534a\u5c31\u662f50\uff0c\u4f46\u5927\u5bb6\u4e0d\u53ef\u80fd\u586b100\u554a\uff0c\u56e0\u4e3a\u8fd9\u6837\u8868\u793a\u5168\u73ed\u5e73\u5747\u6570\u4e3a200\u3002\u8fd9\u4e2a\u5927\u5bb6\u90fd\u60f3\u5f97\u5230\uff0c\u6240\u4ee5\u7edd\u5bf9\u4e0d\u4f1a\u586b50\uff0c\u9664\u975e\u5934\u8111\u4e00\u65f6\u77ed\u8def\u3002\u90a3\u4e48\u90fd\u4f1a\u8003\u8651\u586b25\uff0c\u8fd9\u662f\u7edd\u5927\u591a\u6570\u7684\u60f3\u6cd5\u3002\u4f60\u591a\u8003\u8651\u4e00\u6b65\uff0c\u90a3\u4e48\u5e73\u5747\u4e0b\u6765\u7684\u4e00\u534a\u5c31\u662f12.5\uff0c\u90a3\u4e48\u53d612\u8fd8\u662f13\u5462\uff0c\u5e94\u8be5\u662f12\uff0c\u56e0\u4e3a\u8fd8\u6709\u6781\u5c11\u6570\u4f1a\u548c\u4f60\u4e00\u6837\u8003\u8651\u5230\u519912\u621613\uff0c\u751a\u81f3\u8003\u8651\u51996\u62163\u7684\uff0c\u8fd9\u683712.5\u5c31\u4f1a\u88ab\u62c9\u4f4e\uff0c\u53bb\u9664\u96f6\u59340.5\u5c31\u662f12\u4e86\u3002
\u7ed3\u8bba\uff1a\u5176\u5b9e\u8fd9\u5c31\u662f\u4e00\u4e2a\u5fc3\u7406\u7684\u535a\u5f08\u6280\u5de7\uff0c\u7ecf\u9a8c\u662f\u4f60\u6bd4\u5927\u591a\u6570\u4eba\u591a\u8003\u8651\u4e00\u6b65\u5c31\u597d\uff0c\u7edd\u5bf9\u4e0d\u8981\u591a\u4e24\u6b65\u6216\u4e09\u6b65\uff0c\u5426\u5219\u5c31\u662f\u806a\u660e\u53cd\u88ab\u806a\u660e\u8bef\u4e86\uff01
\u5982\u679c\u4f60\u53bb\u7edf\u8ba1\u4e00\u4e0b\u4f1a\u53d1\u73b0\uff0c\u7edd\u5927\u591a\u6570\u90fd\u5199\u7684\u662f25\u5de6\u53f3\uff0c\u8fd9\u662f\u6b63\u5e38\u667a\u529b\u6c34\u5e73\uff0c\u5199100\u7684\u80af\u5b9a\u667a\u529b\u4e0d\u8fc7\u5173\uff0c50\u5de6\u53f3\u7684\u592a\u5e73\u5eb8\uff0c\u51996\u751a\u81f33\u5de6\u53f3\u7684\u795e\u7ecf\u8d28\u4e86\u70b9\uff0c\u6240\u4ee5\u519912\u621613 \u7684\u4eba\u6709\u6295\u8d44\u6f5c\u529b\uff0c\u6bd4\u5982\u8bf4\u7092\u80a1\u3002
参考资料：数学期望
绛旓細涓夊垎涔50 鍙傝冭祫鏂欙細鏁板鏈熸湜 鍙傝冭祫鏂欙細http://baike.baidu.com/view/18713.htm
绛旓細鑻姣忎汉閮藉啓100杩欎釜鏁扮殑鏈澶у兼槸66 瀹為檯涓婅繖涓暟瀛楁渶澶у兼槸44 鐞嗘兂鍖栫殑鎯呭喌涓嬪鏋滄湁瓒冲澶氱殑浜哄弬鍔狅紝骞朵笖鏈夌悊鏅 杩涜鎬濊 澶у浜掔浉淇′换 閭ｄ箞杩欎釜鏁颁负1 eg锛20浜哄疄闄呮搷浣滀簡涓娆 绛旀鏄27.8
绛旓細鎵椂閽 娓告垙瑙勫垯: 1銆佸湪鐧芥澘鎴栧澹佷笂鐢涓涓澶х殑鏃堕挓妯″瀷,鍒嗗埆灏嗘椂閽熺殑鍒诲害鏍囪瘑鍑烘潵; 2銆佹壘涓変釜浜哄垎鍒壆婕旀椂閽熺殑绉掗拡銆佸垎閽堝拰鏃堕拡,鎵嬩笂鎷跨潃涓夌闀垮害涓嶄竴鐨勬瀛愭垨鍏朵粬閬撳叿(浠ｈ〃鏃堕挓鐨勬寚鏍)鍦ㄦ椂閽熷墠闈㈢珯鎴愪竴绾靛垪(娉ㄦ剰鏄儗鍚戠櫧鏉挎垨澧欏,鎵紨鑰呯湅涓嶅埌鏃堕挓妯″瀷); 3銆佷富鎸浜轰换鎰璇村嚭涓涓椂鍒,姣斿鐜板湪鏄3灏忔椂45鍒15绉...
绛旓細1/2*80=40鍗冪背 (60-40)/(80-45)=4/7 4/7+1/2=15/14 璁綳灏忔椂鍚庤拷涓 80X=45*(X-1/2)+60 瑙ｅ緱X=15/14 4銆佹煇椋炴満鍘熷畾浠ユ瘡灏忔椂495鍗冪背鐨勯熷害椋炲線鐩殑鍦,鍚庡洜浠诲姟绱ф,椋炶閫熷害鎻愰珮鍒版瘡灏忔椂660鍗冪背,缁撴灉鎻愬墠1灏忔椂鍒拌揪,闂荤殑鑸▼鏄灏戝崈绫? X/495-X/660=1 X=1980 5銆佷竴鐡堕叡娌瑰厛鍚冨幓0.6...
绛旓細娓告垙閬撳叿:鍟ら厭鏁扮摱 姣忎綅娓告垙鑰呴厤澶囧惛绠′簩鏉,閫忔槑鑳朵竴鍗锋父鎴忚鍒:鍚勪綅閫夋墜榻愮珯浜庡彴鍓,涓绘寔浜轰竴浜涗护涓嬪嵆鍙紑濮嬪惛鍟ら厭浣嗘槸蹇呴』鏄敤閫忔槑鑳跺皢浜屾潯鍚哥杩炴帴璧锋潵,璋佸湪鏈鐭殑鏃堕棿鍐呰繛鎺ュソ鍚哥涓旀渶蹇皢鍟ら厭鍚稿畬鐨勮幏鑳溿備簩銆佹潃浜哄弬鍔犱汉鏁:8浜轰互涓婁负浣虫柟寮:鍥村潗涓鍦堟楠:1,鎸変汉鏁板噯澶鑻ュ共绾稿洟,"瑁佸垽"涓涓銆"鏉鎵"涓や釜...
绛旓細瀵 6 5 4 3 2锛岀粡1杞 锛5 4 3 2 1鈥5锛10 4 3 2 1锛鍐嶇粡1杞紙9 3 2 1 0鈥5锛14 3 2 1 0 鏄剧劧鍙互杩涜鐨勮疆鏁帮紝灏辨槸鏈鍚1浜虹殑绯栨暟銆傛瘡杩涜1杞紝绗1浜虹硸鏁板鍔狅紙浜烘暟灏1锛変笖鈥滄伆鏈2涓浉閭荤殑鍚屽鍏朵腑涓涓浜虹殑绯栨灉鏄彟涓涓汉鐨5鍊嶁濆彧鑳芥槸绗1浜轰笌绗2浜恒傚嵆浠ゆ讳汉鏁颁负X...
绛旓細鐢辨劅鎬ц璇嗗埌鐞嗘ц璇嗏斺旈忔瀽涓绫绘悘寮堟父鎴忕殑瑙ｇ瓟杩囩▼ 寮犱竴椋炰竴銆 娓告垙 !!###!##$%娓告垙A:鐢蹭箼涓や汉闈㈠鑻ュ共鍫嗙煶瀛,鍏朵腑姣忎竴鍫嗙煶瀛愮殑鏁扮洰鍙互浠绘剰纭畾銆備緥濡傚浘1鎵绀虹殑鍒濆灞闈:鍏眓=3鍫,鍏朵腑绗竴鍫嗙殑鐭冲瓙鏁癮1=3,绗簩鍫嗙煶瀛愭暟a2=3,绗笁鍫嗙煶瀛愭暟a3=1銆備袱浜鸿疆娴佹寜涓嬪垪瑙勫垯鍙栬蛋涓浜涚煶瀛,娓告垙鐨勮鍒欏涓:姣忎竴姝...
绛旓細绛旀涓21 瑙ｏ細姣忎汉鍙1浠舵椂鏈4绉嶄笉鍚岀殑鍙栨硶,姣忎汉鍙2浠舵椂,鏈6绉嶄笉鍚岀殑鍙栨硶.褰撴湁11浜烘椂,鑳戒繚璇佽嚦灏戞湁2浜哄彇寰楀畬鍏ㄤ竴鏍:褰撴湁21浜烘椂,鎵嶈兘淇濊瘉鍒板皯鏈3浜哄彇寰楀畬鍏ㄤ竴鏍.
绛旓細for(i=0;p<num+n;i++,p++)p=i+1;//缁欐瘡涓汉浠庢湭鏈1寮濮嬫帓涓彿 p=num;k=n;//浠庣涓涓浜烘姤鏁拌捣锛宬鐢ㄦ潵璁＄畻鍓╀笅鐨勪汉鏁 for(m=0,i=0;k!=1;i++) //鐢╧鏉ユ帶鍒跺嚭鍙 { if(p>(num+n-1)) p=num; //鎶婁汉鍥存垚涓涓湀閭ｆ牱锛屾渶鍚庝竴浜烘姤鍚庯紝鍙堝洖鍒伴槦澶 if(*p!=0) m...
绛旓細100梅(1+1/3)=100脳3/4 =75锛堜汉锛
