GWD上一道数学题答案错了吧？求证~~~

sophiagregmat · 发表于 2012-8-1 09:21:16

When tossed, a certain coin has equal probability of landing on either side.If the coin is tossed 3 times, what is the probability that it will land on the same side each time?

A. 1/8 B 1/4 C1/3 D3/8 E1/2

jsmart · 发表于 2012-8-1 09:26:49

1/2*1/2*1/2+1/2*1/2*1/2=2/8=1/4

GWD上一道数学题答案错了吧？求证~~~

所属分类: GMAT考试

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