Looks like a binomial distribution question.
I read your question to say that exactly 5 are to respond.
prob(response) = .15
prob(no response) = .85
prob(5 of 15 respond)
= C(15,5) (.15)^5 (.85)^10
= appr .0449
I'm not sure where to start...
Mail order marketing companies have a response rate of 15% to their advertising flyers. If 25 people receive the flyer, what is the probability that 5 people respond to the flyer?
3 answers
Where did you get the 10?
Oh, I see. There are 25 to receive the flyer total, you misread it as 15.
=C(25,5)(.15)^5(.85)^20
= appr 0.156
=C(25,5)(.15)^5(.85)^20
= appr 0.156
0 answers