天山3-23的正确答案是什么？

monicars

Q23:
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
C. 1/3
D. 3/8
E. 1/2

这题的答案是A 还是B啊？我觉得应该是Ａ啊

sammen

答案是B吧.比如都是A面的概率是0.5*0.5*0.5=1/8;都是B面也是1/8.问题问的是同一面,那么是A的概率+B的概率=1/4

luoye1

agree   ding !!!