A hat contains 7 names of players in a tennis squad including the captain and the vice captain. If a team of 3 is chosen at random by drawing the names from the hats, determine the probability
that it does not:
(a) contain the captain
(b) contain the captain or the vice captain.
Probability - Compound events
2010-02-27 8:38 am
回答 (1)
2010-02-27 8:52 am
✔ 最佳答案
a) P(Does not contain the captain)= 6C3 / 7C3
= 20/35
= 4/7
b)P(Does not contain the captain or the vice captain)
= 1 - P(contain the captain and the vice captain)
= 1 - [(7-2) / 7C3]
= 1 - 5/35
= 6/7
收錄日期: 2021-04-13 17:07:26
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