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Find the probability of rolling a sum less than 5 or a sum greater than 7 when a pair of dice is rolled.

User Maxxxo
by
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1 Answer

1 vote

Answer:

Explanation:

Solution

There are 36 possible ways to combine two dice. The ones you are interested in, are in the table below

Numbers less that 5 are with their probabilities

Number Probability How done.

2 1/36 1 + 1

3 2/36 2 + 1 1 + 2

4 3/36 2 + 2 1 +3 3 + 1

Total 6/36 1/6

Greater than 7

Number Probability How done

8 5/36 6+2 2+6 5 +3 3+5 4 + 4

9 4/36 6+3 3 + 6 5+4 4+ 5

10 3/36 6+4 4 +6 5 + 5

11 2/36 5+6 6 + 5

12 1 /36 6 + 6

Total 15/36

Answer

15/36 + 1/6 = 15/36 + 6/36 = 21/36

Final Answer: 7/12

User Estebro
by
6.2k points