one question on probability/ Counting
Question Description
At a charity event, the lottery prizes include two $500 coupons, three $100 coupons, and five
$10 coupons.
a) If 15 lottery tickets are preselected, in how many ways can the 10 prizes be won?
b) If 10 lottery tickets are selected, in how many ways can the 10 prizes be won?
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