SOLUTION: A manufacturer of window frames knows from long experience that 5 percent of the production will have some type of minor defect that will require an adjustment. What is the prob

Question 474106: A manufacturer of window frames knows from long experience that 5 percent of the production will have some type of minor defect that will require an adjustment. What is the probability that in a sample of 20 window frames:
a. None will need adjustment?
b. At least one will need adjustment?
c. More than two will need adjustment?

Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
p=.5, q=.95, n=20
.
a)q^20=.3585
.
b)1-.3585=.6415
.
c)q^20+20*q^19*190*p+q^18*p^2=.9245 two or less will need adjustment.
1-.9245=.0755 More than two will need adjustment.
.
Ed
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