Question: A manufacturing of window frames knows from long experience that 1 percent of the production will have some type of minor defect that will require

A manufacturing of window frames knows from long experience that 1 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 most one will need adjustment?

c. More than one will need adjustment?Please again keep three decimals. And keep the '0' before the decimal point.

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