SOLUTION: The expected value of the numbers of heads obtained when three coins are tossed simultaneously

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Question 1071807: The expected value of the numbers of heads obtained when three coins are tossed simultaneously
Answer by Fombitz(32388) About Me  (Show Source):
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There are 8 possible outcomes.
The distribution of heads for the eight outcomes is,
0H - 1
1H - 3
2H - 3
3H - 1
So the corresponding probability is,
0H:1/8
1H:3/8
2H:3/8
3H:1/8
The expected value is then,
E=0%281%2F8%29%2B1%283%2F8%29%2B2%283%2F8%29%2B3%281%2F8%29
E=3%2F2