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xenn [34]
3 years ago
7

Two numbers rolled can be added to get a sum. Find P(sum is even.)

Mathematics
1 answer:
azamat3 years ago
6 0
When you roll two numbers you have four kinds of outcomes: EE, EO, OE, OO (where E = even, O = odd).

You get an even sum only if you sum two numbers that are both even or both odd, therefore the outcomes wanted are two: EE and OO.

Therefore:
P(sum is even) = 2 / 4 = 0.5

Hence, there is a 50% probability that, when you roll two numbers, their sum will be even.
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