<PRE><B>Question 730640</B>
Flipping a fair coin 4 times. We win x euros when we bring x crowns unless we bring a single crown so not winning anything. 
On average how many euros can you expect to win? (find the expected value) 
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# of crowns:::::::::::::  0.......1.......2........3........4
Random winning values:::  0.......0.......2........3........4
Probabilities::::::::::::1/16.....4/16...6/16.....4/16.....1/16


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E(x) = [0 + 0 + 12 + 12 + 4]/16 = 28/16 = 1.75 euros

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Cheers,
Stan H.</PRE>