How many sequences contain exactly two heads when you flip a coin six times?
A)4
B)12
C)15
D)8
E)none of these choices

Question

Quizplus · Accepted Answer

The number of sequences that contain exactly two heads when flipping a coin six times can be calculated using the combination formula, which is C(n, k) = n! / [k!(n-k)!], where n is the total number of flips (6 in this case) and k is the number of heads (2 in this case). Therefore, C(6, 2) = 6! / [2!(6-2)!] = (6*5) / (2*1) = 15.

How Many Sequences Contain Exactly Two Heads When You Flip