Question

A batch of 125 lightbulbs contains 13 that are defective. If you choose 8 at random

(without replacement), what is the probability that

(a) None are defective?

(b) Exactly one is defective?

(c) More than 2 are defective?

whats needed

1) Define a random variable in words. (e.g. X = number of heads observed)

2) Specify the distribution of the random variable including identifying the value(s) of any

parameter(s). (e.g. X ∼ Binomial(10, 5))

3) State the desired probability in terms of your random variable (e.g. P(X < 3)).

4) Calculate the desired probability (e.g. P(X < 3) = .055). [Note: You may need more

than 1 random variable per question.]

Answer 1

Hope this will help you. Thank you :)

answered by: anonymous