Mathematics, 03.01.2020 05:31 skrska

Ron finds 9 books at a bookstore that he would like to buy, but he can afford only 5 of them. in how many ways can he make his selection? how many ways can he make his selection if he decides that one of the books is a must?
a. 3024; 1680
b. 7560; 840
c. 120; 1680
d. 126; 70

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Ron finds 9 books at a bookstore that he would like to buy, but he can afford only 5 of them. in how...