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September 21, 2014

September 21, 2014

Posted by **uma** on Sunday, February 20, 2011 at 1:25am.

- statistics -
**PsyDAG**, Sunday, February 20, 2011 at 10:46amProofread your questions before you post them.

"20 of them are girls and boys"?

I will asume 20 are girls and 30 are boys.

P(fair) = 5/50

p(rich) = 10/50

p(IQ) = 3/50

P(girl) = 20/50

Probability of all events occurring is found by multiplying the individual probabilities.

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