When four coins are tossed simultaneously, in _______ number of the outcomes at most two of the coins will turn up as heads.
A. 17
B. 28
C. 11
D. 43
Answer:C
When four coins are tossed simultaneously, in _______ number of the outcomes at most two of the coins will turn up as heads.
A. 17
 B. 28
 C. 11
 D. 43

Explanation: The question requires you to find number of the outcomes in which at most 2 coins turn up as heads i.e., 0 coins turn heads or 1 coin turns head or 2 coins turn heads. The number of outcomes in which 0 coins turn heads is 4C0 = 1 outcome. The number of outcomes in which 1 coin turns head is 4C1 = 6 outcomes. The number of outcomes in which 2 coins turn heads is,
