Question 578817
Given: P(good)= 0.70 and P(defective)= 0.30 

In a sample of five items, find P(exactly four are good)
-----
P(x = 4) = 5C4*0.7^4*0.3 = binompdf(5,0.7,4) = 0.3601
==============
Cheers,
Stan H.
=============