Algebra Help?
回答 (2)
2016-08-02 8:54 pm
P(tail) = 1/2
P(head) = 1/2
P(3 tails when tossing a coin 4 times)
= P(3 tails and 1 head)
= C(4,3) × (1/2)³ × (1/2)
= 6 × (1/8) × (1/2)
= 3/8
P(head) = 1/2
P(3 tails when tossing a coin 4 times)
= P(3 tails and 1 head)
= C(4,3) × (1/2)³ × (1/2)
= 6 × (1/8) × (1/2)
= 3/8
2016-08-02 8:55 pm
3/8 ...
收錄日期: 2021-04-18 15:29:17
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https://hk.answers.yahoo.com/question/index?qid=20160802125155AAjP4Nt