Any Help??
回答 (1)
2016-12-04 1:47 pm
a) 2^5 = 32
b) p(3 heads or 3 tails) =
p(3 heads) + p(3 tails) =
(1/2)^3 * (1 - 1/2)^2 * 5C3 + (1/2)^3 * (1 - 1/2)^2 * 5C3 =
1/8 * 1/4 * 10 + 1/8 * 1/4 * 10 =
20/32 = 5/8
Solve the others similarly.
b) p(3 heads or 3 tails) =
p(3 heads) + p(3 tails) =
(1/2)^3 * (1 - 1/2)^2 * 5C3 + (1/2)^3 * (1 - 1/2)^2 * 5C3 =
1/8 * 1/4 * 10 + 1/8 * 1/4 * 10 =
20/32 = 5/8
Solve the others similarly.
收錄日期: 2021-04-23 23:53:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161204033729AA25E3Y