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Help please! asap!

Tommy plays a game in which he rolls two standard number cubes. On any one roll, what is the probability that the sum of the numbers rolled is even? Show your work.
if you can attempt to type out a table... that would be great lol.

User JefGli
by
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1 Answer

3 votes

Answer: 50% or 1/2

Explanation:

number of possible combos:

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+4, 6+5, 6+6

number of even sums within combos:

1+1, 1+3, 1+5

2+2, 2+4, 2+6

3+1, 3+3, 3+5

4+2, 4+4, 4+6

5+1, 5+3, 5+5

6+2, 6+4, 6+6

TOTAL combos:

36

TOTAL even sums:

18

so that means 18/36 or 1/2 of the possible combinations has a sum of an even number.

sorry it’s not a table but I literally worked it out while answering so that’s all my work

User Kimchy
by
3.2k points