Dice probability

Question

There are two dice. What is the probability of one of the dice showing 2 or the sum being at least 8?

Answer 1

There are 36 possible combinations or outcomes from a pair of dice expressed as 1/6 * 1/6

The probability of rolling a 2 on a single die is 1/6  There are 10 possible rolls with combinations with only 1 of the dies showing a 2.

There are six ways to roll a seven expressed as 6/36 or (1/6), 5 ways to roll an 8 (5/36), 4 ways to roll a 9 (4/36), 3 ways to roll a 10 (3/36), 2 ways to roll an 11 (2/36), and 1 way to roll a 12 (1/36) making 15 possible combinations for the sum totaling 8 or higher.

Note: Equations have not been reduced

This should help you with completing the equation on your own.

 

 

 

 

Answer 2

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