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CryptoMath
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Homework Statement
You buy 15 boxes each containing 4 microprocessors. All microprocessors come from a very large lot in which 9.5 % of microprocessors are defective. Y = the number of boxes in which there is less than 2 defective microprocessors.
QUESTION:
Find the Variance of the variable Y
Homework Equations
The Attempt at a Solution
I am thinking this is Binomial.
We are looking of a number of boxes that has less than 2 defective, which means (0 or 1) is acceptable.
We know there is 15 boxes with 4 microprocessors each.
So 15*4 = 60 total microprocessors
9.5% of microprocessors are defective, so 60*9.5%=5,7
n=15
p=??
Am I thinking this right ? Pretty much stuck here.
Thanks