What is the probability of getting exactly one heads?

the chance (roughly) of flipping three coins and getting exactly one head is either;

IMPOSSIBLE:     If u flipped three coins u could get 1 heads AND 2 tails, the question states 

"What is the probability of getting EXACTLY one heads? "

(wrong grammer but who cares) is impossible because youu wouldn't get EXACTLY one head, you would get one head AND 2 tails.

OR

the probability of getting 1 head and 2 tails is 25%

1/4 (one outof six)

possible coin combinations are:

all heads, all tails, 2 heads 1 tail, 2 tails 1 head.

depending on how the question is answered,  depends on the answer. good problem though at first seems simple actualy is SLIGHTLY more complex than at first glimpse