SOLUTION: suppose a coin is tossed three times. what is the probability getting 2 heads?

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Question 890716: suppose a coin is tossed three times. what is the probability getting 2 heads?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
There are 8 different outcomes:
HHH
TTT
HTT
THH
THT
HTH
TTH
HHT
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The probability of getting any certain 1 of
these ( such as THT ) is:
+%281%2F2%29%2A%281%2F2%29%2A%281%2F2%29+=+1%2F8+
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Looking at the list, there are 3
different ways to get 2 heads
( and obviously 1 tail )
THH
HTH
HHT
----------
The probability of getting ANY of these
outcomes is +3%2F8+
---------------------
This is:
( THH ) OR ( HTH ) OR ( HHT ) which is:
+1%2F8+%2B+1%2F8+%2B+1%2F8+=+3%2F8+