Question

How many sequences contain exactly three heads when you flip a coin five times? my answer was 15 but apparently I am wrong

2
15
10
8
12

Answer 1

HHHTT
HTHHT
HTTHH
HHTHT
HHTTH
HTHTH
TTHHH
THTHH
THHTH
THHHT

Can you think of any other sequences?

Answer 2

httth