Question

rticular telephone number is used to receive both voice calls and fax messages. Suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (Round your answers to three decimal places.)

(a) What is the probability that at most 8 of the calls involve a fax message?


(b) What is the probability that exactly 8 of the calls involve a fax message?


(c) What is the probability that at least 8 of the calls involve a fax message?


(d) What is the probability that more than 8 of the calls involve a fax message?

You may need to use the appropriate table in the Appendix of Tables to answer this question

Answer 1

(A) 0.851

(B) 0.124

(C) 0.273

(D) 0.149