SOLUTION: If we roll two dice 180 times, how many times can we expect the dice to show a sum of five?

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Question 653249: If we roll two dice 180 times, how many times can we expect the dice to show a sum of five?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If we roll two dice 180 times, how many times can we expect the dice to show a sum of five?
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Ways to get a "5": 1/4 ; 2/3 ; 3/2 ; 4/1
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P(throw a 5) = 4/36 = 1/9
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Expected number is 180 throws: (1/9)180 = 20
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Cheers,
Stan H.