Probability

#1
Producing machine provides 20% incorrect products. Let's randomly pick 4 produced products. Find the probability that:
a) There is exactly one incorrect product.
b) There is no incorrect products.
c) There is at least one correct product.
 

Dason

Ambassador to the humans
#2
Hi! We are glad that you posted here! This looks like a homework question though. Our homework help policy can be found here. We mainly just want to see what you have tried so far and that you have put some effort into the problem. I would also suggest checking out this thread for some guidelines on smart posting behavior that can help you get answers that are better much more quickly.