有8张数字卡片，分别写着2，3，5，6，7，8，9，10．（1）冬冬赢的可能性是多少？（2）胖胖赢的可能性是多
\u57284 7 9\u8fd9\u4e09\u5f20\u6570\u5b57\u5361\u7247\u4efb\u53d62\u5f20\uff0c\u53d6\u52307\u548c9\u7684\u53ef\u80fd\u6027\u662f\uff08 \uff09\u4e09\u5206\u4e4b\u4e00\uff0c\u82e5\u5c06\u8be5\u9898\u770b\u4f5c\u5206\u6b21\u62bd\u53d6\uff0c\u5219\u5171\u6709\u516d\u79cd\u60c5\u51b5\uff1a4 7,4 9,7 4,7 9,9 4,9 7,\u6545\u4e3a\u4e09\u5206\u4e4b\u4e00\uff1b\u82e5\u770b\u4e3a\u4e0d\u5206\u6b21\u62bd\u53d6\uff0c\u5219\u6709\u4e09\u79cd\u60c5\u51b5\uff1a4\u548c7,4\u548c9,7\u548c9,\u6545\u4e3a\u4e09\u5206\u4e4b\u4e00\uff1b\u53e6\u5916\u4f60\u4e5f\u53ef\u4ee5\u8fd9\u6837\u8003\u8651\uff1a\u7b2c\u4e00\u6b21\u8981\u62bd\u52307\u62169\uff0c\u6982\u7387\u4e3a\u4e09\u5206\u4e4b\u4e8c\uff0c\u7b2c\u4e8c\u6b21\u7701\u4e0b4\u548c\uff0c7\u4e0e9\u4e2d\u7701\u4e0b\u7684\u6570\uff0c\u62bd\u5230\u540e\u8005\uff0c\u4e5f\u5c31\u662f\u4e0d\u62bd\u52304\u7684\u6982\u7387\u4e3a\u4e8c\u5206\u4e4b\u4e00\uff0c\u76f8\u4e58\u5f97\u4e09\u5206\u4e4b\u4e00\uff01\u8c22\u8c22\u91c7\u7eb3\uff01
\u8fd9\u4e2a\u5e94\u8be5\u662f\u9ad8\u4e2d\u65f6\u5019\u6392\u5217\u7ec4\u5408\u7684\u95ee\u9898\uff1a
\u5c0f\u4e3d\u80dc\u5f97\u53ef\u80fd\u6027\u4e3a4/9\uff0c\u5c0f\u96e8\u80dc\u5f97\u53ef\u80fd\u6027\u4e3a5/9\uff0c\u6240\u4ee5\u8fd9\u4e2a\u6e38\u620f\u89c4\u5219\u662f\u4e0d\u516c\u5e73\u7684\uff0c\u53ef\u4ee5\u5c06\u6e38\u620f\u89c4\u5219\u6539\u4e3a\u7b2c\u4e00\u6b21\u62bd\u4e00\u5f20\u724c\uff0c\u7b2c\u4e8c\u6b21\u62bd\u4e24\u5f20\u724c\uff0c\u4e24\u6b21\u90fd\u5927\u7684\u80dc\u51fa\uff0c\u6b64\u65f6\u4e24\u4eba\u80dc\u51fa\u7684\u53ef\u80fd\u6027\u90fd\u4e3a1/2\uff0c\u6bd4\u8d5b\u516c\u5e73\u3002
=7÷16
=
| 7 |
| 16 |
答：冬冬赢的可能性是
| 7 |
| 16 |
（2）1-
| 7 |
| 16 |
| 9 |
| 16 |
答：胖胖赢的可能性是
| 9 |
| 16 |
（3）答：要使规则公平，可把10换成4．
绛旓細10 11 10 11 12 13 20 21 22 23 30 31 32 33 12涓
绛旓細1-8涓紝鍋舵暟鏈4涓紝濂囨暟鏈4涓锛3鐨勫嶆暟鏈2涓紱鎽稿埌濂囨暟鐨勫彲鑳芥ф槸锛4梅8= 1 2 锛鎽稿埌鍋舵暟鐨勫彲鑳芥ф槸锛4梅8= 1 2 锛屾懜鍒3鐨勫嶆暟鐨勫彲鑳芥ф槸锛2梅8= 1 4 锛岀瓟锛氭懜鍒板鏁扮殑鍙兘鎬ф槸 1 2 锛庢懜鍒板伓鏁扮殑鍙兘鎬ф槸 1 2 锛屾懜鍒3鐨勫嶆暟鐨...
绛旓細瑙 锛1锛夎鍙栧嚭鐨涓夊紶鍗＄墖閮藉啓鏈1鐨勬鐜囦负P锛岀敱棰樻剰锛 P= C 13 C 28 ? C 12 C 18 = 3脳2 28脳8 = 3 112 鈥︼紙4鍒嗭級锛2锛壩剧殑鍙栧煎彲涓猴細0锛1锛2锛3锛4 P(尉=0)= 2 8 脳 3 8 = 3 32 P(尉=1)...
绛旓細24閬擄紝鍔犳硶浜ゆ崲寰嬩袱涓姞鏁颁氦鎹㈢殑鐣ャ124 + 876 = 1000 126 + 874 = 1000 143 + 857 = 1000 147 + 853 = 1000 153 + 847 = 1000 157 + 843 = 1000 174 + 826 = 1000 176 + 824 = 1000 214 + 786 = 1000 216 + 784 = 1000 284 + 716 = 1000 286 + 714 = 1000 342 + ...
绛旓細涓鍏辨湁9绉嶄笉鍚岀殑鎷挎硶銆傚垎鏋愯繃绋嬪涓嬶細灏忕孩鍜屽皬鍔鍚勬湁8銆2銆5涓夊紶鏁板瓧鍗＄墖锛姣忎汉鎷垮嚭涓寮狅紝鍙互鐪嬫垚涓ゆ銆傜涓姝ュ皬绾㈠厛鎷匡紝灏忕孩鏈3绉嶉夋嫨銆傜浜屾灏忓姏鎷匡紝灏忓姏涔熸湁3绉嶉夋嫨銆傜敱姝ゅ彲寰楋細鎷挎硶=3脳3=9绉嶃鍒嗗埆鏄細88 82 85 28 22 25 58 52 55銆
绛旓細1+2+6 1+3+5 2+3+4
绛旓細鍏跺疄寰堢畝鍗 1+2+3+4+5+6+7+8+9=45 鍑忓幓娌℃娊鍒扮殑閭ｅ紶锛屽氨鍒嗗埆寰楀埌44 43 42 41 40 39 38 37 36 杩9绉
绛旓細4锛6锛8锛10鍏5寮狅紝鏁板瓧鏄3鐨勫嶆暟鐨鍗＄墖鏈3锛6锛9鍏3寮狅紝鏁板瓧鏄5鐨勫嶆暟鐨勫崱鐗囨湁5锛10鍏2寮狅紝鈭翠粠涓换鎰忔娊鍙栦竴寮狅紝鎶藉埌鏁板瓧5鐨勫崱鐗囩殑姒傜巼鏄1/10锛涙娊鍒版暟瀛楁槸2鐨勫嶆暟鐨勫崱鐗囩殑姒傜巼鏄5/10=1/2锛涙娊鍒版暟瀛楁槸3鐨勫嶆暟鐨勫崱鐗囩殑姒傜巼鏄3/10锛涙娊鍒版暟瀛楁槸5鐨勫嶆暟鐨勫崱鐗囩殑姒傜巼鏄2/10=1/5.
绛旓細缁勬垚鐨勪袱浣嶆暟鏈夛細9脳8=72锛堜釜锛夛紟鏁呯瓟妗堜负锛72锛
绛旓細杩欎釜鏄釜鍙ゅ吀姒傚瀷 鍏辨湁9*9=81绉嶆儏褰 婊¤冻鏉′欢鐨勬湁3+9,4+8,5+7,6+6,7+5,8+4,9+3锛鍏7绉嶆儏褰 鎵浠 鎵姹傛鐜囦负7/81
