Problem 2. A factory manufactures widgets. The probability that a widget manufactured at the factory is defective is 3%, and the occurrence of defects are independent. Use a Poisson approximation to...

I need the solution of question attached. Thanks!

Extracted text: Problem 2. A factory manufactures widgets. The probability that a widget manufactured at the factory is defective is 3%, and the occurrence of defects are independent. Use a Poisson approximation to compute the probability that in a shipment of 400 widgets no more than 3 are defective.