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October 24, 2014

Homework Help: Data management!! [ Hi economyst] Please Help.

Posted by rock johnny on Monday, September 28, 2009 at 11:09am.

Hi. economyst. Thanks for your help with my other questions. But I am still stuck with this question:

@@@@My question: Rain is an amazing singer, but cannot play any instruments. He desperately wants a rock band that has a drummer, a guitarist, a bass player, and himself on vocals. He decides to post an ad at the local coffee house for open auditions for his band - The Combinations.
At the auditions, Rain gets 5 females and 9 males trying out for the remaining 3 positions in the band that can play all the instruments.

a) What is the probability that the band will have 3 males and 1 female?

b) What is the probability that the band will have at least 2 males?@@@@

@@@@economyst answered:

* Another Data Management Question - economyst, Saturday, September 26, 2009 at 11:02am

Follow the logic i gave you in your previous post. Remember, the formula for n-choose-x is n!/x!*(n-x)! where ! means factorial.

* Another Data Management Question - economyst, Saturday, September 26, 2009 at 1:43pm

hint for b) Since Rain is male, having at least two males means picking at least one male. Which is equal to (1-P) where P is the probability of picking 3 females.@@@@

I would be really greatful if you help me solve it. Thanks again. :)

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