[問題]天山 03-23

[Janet]

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

Answer: B

為何不是(1/2)^3= 1/8 呢?

[yak167]

都是同一面的機率是1/8
正面反面都ok 所以1/8 x 2 = 1/4

[Janet]

謝謝~~非常的清楚!!