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????????????????????????-example-1
User Yster
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1 Answer

4 votes

Answer:


P(Sum = 9) = (1)/(9)

Explanation:

Given

Outcomes of rolling two dice

Required

P(Sum = 9)

From the given outcomes, we have:


n(S) = 36 -- the sample size


Sum = 9:=\{(3,6),(4,5),(5,4),(6,3)\}

So.


n(Sum = 9) = 4

The probability is:


P(Sum = 9) = (n(Sum = 9))/(n(S))


P(Sum = 9) = (4)/(36)

Simplify


P(Sum = 9) = (1)/(9)

User Friend Of Kim
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