a company receives a shipment of 16 items.a random variable of 4 items is selected,and the…

a company receives a shipment of 16 items.a random variable of 4 items is selected,and the shipment is rejected if only these items proves to be defective.
a)what is probability of accepting a shipment containing 4 defective item?
b)what is the probability of accepting a shipment containing 1 defective item?
c)what is the probability of rejecting a shipment containing 1 defective item?