In a sports competition, 29 medals were awarded in swimming, 18 in racing and 22 in tennis. It is given that 6 players got medals in all 3 activities and a total of 50 players were awarded medals in the competition. If a player can win at most 1 medal in 1 activity, then which of the following is the number of players who received exactly 2 medals in the competition?
Which of the following is the number of proper subsets of:
P is a set of integers in an arithmetic progression. If the mean of set P is 0, one of the terms of set P is 0.
If A = {1, 2, 3, 5, 7}, B = {3, 4, 5, 7} and C = {0, 4, 9}, then which of the following is
