What is the probability....
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What is the probability....

[From: ] [author: ] [Date: 11-05-07] [Hit: ]
In a random sample of 4 participants, what is the probability that an investigator will draw at least 2 male?Probability of selecting 3 female,Total probability of selecting 0 or 1 male = 5/16.Therefore probability of selecting 2 or more males = 1 - 5/16 = 11/16-0.5625,......
In a large on-the-job training program, half of the participants are female and half are male. In a random sample of 4 participants, what is the probability that an investigator will draw at least 2 male?

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Probability of selecting 4 female = (½)^4 = 1/16

Probability of selecting 3 female, 1 male = 4(½)^3(½) = 4/16

Total probability of selecting 0 or 1 male = 5/16.

Therefore probability of selecting 2 or more males = 1 - 5/16 = 11/16

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0.5625, I think this is correct
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