Question: A box containing a dozen items contains 2 items that are defective. In how many can 7 items be selected such that the defective items

A box containing a dozen items contains 2 items that are defective. In how many can 7 items be selected such that the defective items are selected?

A tennis club has 15 members, 8 men and 7 women. A team of 4 is selected to play in a match. How many different ways can a team be selected if all the players are of the same sex.

How many hexagons and heptagons are determined by 12 points, no 3 of which are collinear?

answer only please

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