Question

Rolling two dice what is the probability of rolling a 5 given that at least one dice shows a 1?

Answer 1

Answer: 11 possible outcomes

This is all the possible outcomes

1,5 2,5 3,5 4,5 5,5 6,5 5,1 5,2 5,3 5,4 5,6

The amount of at least one dice having a 5 is 11

Use formula 2(n) - 1

2(6) - 1 = 11

Hope this helps ^_^

Answer 2

The probability is 1/18.

Explanation:

There are a total of 6^2 = 36 possible combinations of rolling two dice.

There are 2 possible outcomes of rolling a 5 given that at least one dice shows 1 (1,4) and (4,1).

Therefore the probability is 2/36 = 1/18

Let me know if you have any questions.