# statistics

The passing rate for the boards is 34%. If 70 people take the boards, the probability that 30 of them will pass the exam is?

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asked by Sam
1. Try the binomial probability function:

P(x) = (nCx)(p^x)[q^(n-x)]

x = 70
n = 30
p = .34
q = 1 - p = 1 - .34 = .66

Substitute the values and go from there.

An easier way would be to use a binomial probability table with the values stated above.

I hope this will help.

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2. Correction:

x = 30
n = 70

The other values stay the same.

Sorry for any confusion.

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