英语数学概率题Two cards are drawn simultaneously from a standard pa
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英语数学概率题
Two cards are drawn simultaneously from a standard pack of 52 playing cards.Use a tree diagram to find the probablity that:
(A)Both are hearts.
(B)Just one is a heart
Two cards are drawn simultaneously from a standard pack of 52 playing cards.Use a tree diagram to find the probablity that:
(A)Both are hearts.
(B)Just one is a heart
A) Heart Diamond Spade Club
然后每一项下边再把这四个都写出来
然后总共是4x4=16项
n=16
其中两个都是heart的只有一组
所以m=1
概率=1/16
B) Heart Diamond Spade Club
然后每一项下边再把这四个都写出来
然后总共是4x4=16项
n=16
其中有一个heart的有3组,m=3
所以概率=3/16
然后每一项下边再把这四个都写出来
然后总共是4x4=16项
n=16
其中两个都是heart的只有一组
所以m=1
概率=1/16
B) Heart Diamond Spade Club
然后每一项下边再把这四个都写出来
然后总共是4x4=16项
n=16
其中有一个heart的有3组,m=3
所以概率=3/16
英语数学概率题Two cards are drawn simultaneously from a standard pa
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