Question a
P( no broken mirrors ) = 0.99^10
P(at least one)=1-P(none)
=1-0.99^10
Question b
you can use the Central Limit Theorem to solve this question.
a)You take a random sample of 10 mirrors and find 1 broken mirror. What is the probability of finding 1 or more broken mirrors out of a sample of 10 if the probability of receiving a broken mirror is 0.01
b)You take a random sample of 2000 mirrors and find 30 broken mirror. What is the probability of finding 30 or more broken mirrors out of a sample of 2000 if the probability of receiving a broken mirror is 0.01