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# probability

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Adam rolled two standard six-sided dice once. What is the probability that he rolled a prime number on either die? Express your answer as a common fraction.

Jan 9, 2021

#1
+1

Adam rolled two standard six-sided dice once. What is the probability that he rolled a prime number on either die? Express your answer as a common fraction.

Prime numbers are 2, 3, and 5.  1 is not a prime number.

How many of the following rolls have at least one prime number?  Divide that by 36.

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

.

Jan 9, 2021

#1
+1

Adam rolled two standard six-sided dice once. What is the probability that he rolled a prime number on either die? Express your answer as a common fraction.

Prime numbers are 2, 3, and 5.  1 is not a prime number.

How many of the following rolls have at least one prime number?  Divide that by 36.

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

.

Guest Jan 9, 2021