SOLUTION: a meal at a certain restaurant consist of 3 entrees chosen from group of 15 possible entrees. Find the number of possible meal combinations

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There are 15 possible selection for the first of the e item meal. After 1 of the 15 items is selected there are 14 items available from which to select the second pf the e items. Similarily the are 13 items available for the third meal item. So 15*14*13=2730 is the number of 3 item meals available from the 15 available items.