A market sells 40 kinds of candy bars. You want to buy 15 candy bars. (a) How many possibilities are there? (b) How many possibilities are there if you want at least three peanut butter bars and at least ﬁve almond bars? (c) How many possibilities are there if you want exactly three peanut butter bars and exactly ﬁve almond bars? (d) How many possibilities are there if you want at most four toﬀee bars and at most six mint bars?

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The Answer of A market sells 40 kinds of candy bars. You want to buy 15 candy bars. (a) How many possibilities are there? (b) How many possibilities are there if you want at least three peanut butter bars and at least ﬁve almond bars? (c) How many possibilities are there if you want exactly three peanut butter bars and exactly ﬁve almond bars? (d) How many possibilities are there if you want at most four toﬀee bars and at most six mint bars?

A Market Sells 40 Kinds of Candy Bars