How to solve question 15?? How I get the answer d?

Shop, 25 have purchased a computer, the , Thc iputer is5 r shop, 25 have purchased a computer, the probability a. 0.25 b. 0.50 c. 1.00 d. 0.75 computer, the probability that ANSWER: a 15. A student has selected 8 books that she likes, but she has money only for 3 books. How many possible selections does she have? a. 24 b. 240 c. 8 d. 56 ANSWER: d e it ems is selected from 16. A production process has been producing 10% defective items. A sample ofthre ocess. What is the probability that all three items are defective