IBM Company Numerical Ability Permutation and Combination

A college has 10 basketball players. A 5-member team and a captain will be selected out of these 10 players. How many different selections can be made?

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IBM Other Question

In a simultaneous throw of two dice, what is the probability of getting a total of 10 or 11?
A. 1/4 B. 1/6
C. 7/12 D. 5/36
Badri has 9 pairs of dark Blue socks and 9 pairs of Black socks. He keeps them all in a same bag. If he picks out three socks at random what is the probability he will get a matching pair?