A makes optical lenses under contract to the U.S. military.The lenses are ground to precise specifications...?

and are shipped in lots of 100. Military inspectiors check 2 different lenses out of each lof of 100. Let E1 be the event that the first lens inspected fails inspection and E2 be the event that second fails. If either one of the two fails, then the entire shipment of 100 lenses is returned. SUpposed that 3 lenses in the shipment are bad. Find the probability that the shipment is rejected.