SOLUTION: A fair coin is tossed 4 times what is the probability that exactly one head appears and at least one head appears

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Question 1071381: A fair coin is tossed 4 times what is the probability that exactly one head appears and at least one head appears
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
There are 16 possible outcomes with the following distribution of number of heads,
0H : 1
1H : 4
2H : 6
3H : 4
4H : 1
So,
P%28H=1%29=4%2F16=1%2F4
P%28H%3E=1%29=%284%2B6%2B4%2B1%29%2F16=15%2F16