The sample space for a roll of two number cubes is shown in the table.

(1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6)
(2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6)
(3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6)
(4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6)
(5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6)
(6,1)|(6,2)|(6,3)|(6,5)|(6,5)|(6,6)

What is the probability that the roll will result in one even and one odd number?

A. 1/9
B. 1/4
C. 1/3
D. 1/2 ***

The two numbers rolled can be added to get a sum. Find P(sum is greater than 5).

A. 5/6
B. 13/18 ***
C. 2/3
D. 1/2

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1. looks right to me, but don't quote me on it :)

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posted by jill
2. nope.

first, right
second, nope
third, Pr(sum>5) go to your first answer and count those five or greater. I count 30 out of 36. So recount. Did you count 1,4; 1,5, etc?

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3. You mean, it's 5/6...?

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posted by Sandy
4. I mean you have to count and verify my numbers.

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5. No, is 5/6 the answer?

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posted by Sandy

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