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September 21, 2014

September 21, 2014

Posted by **Marla** on Wednesday, February 3, 2010 at 10:35pm.

(a) If three persons are selected at random, what is the probability that all are women? (Round the answer to six decimal places.)

(b) If three persons are selected at random, what is the probability that two are women? (Round the answer to six decimal places.)

(c) If three persons are selected at random, what is the probability that one is a woman? (Round the answer to six decimal places.)

(d) If three persons are selected at random, what is the probability that none is a woman? (Round the answer to six decimal places.)

- Math -
**Reiny**, Wednesday, February 3, 2010 at 11:06pm130 women, 270 men

a) Prob(3 women) = C(130,3)/C(400,3) = 357760/10586800 = .033793

b) Prob(2 women 1 man) = C(130,2)xC(400,1)/C(400,3) = .316810

can you see how I am doing those?

see if you answer the last two yourself.

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