Question

Two standard dice are rolled and their face values multiplied. What is the probability that the product is prime or ends in a 5?

Answer 1

`(11)/(36)`

Explanation:

To find the probability that the product is prime or ends in a 5, we need to look into the face value, the numbers that are prime when you multiply the face value are 6 and the numbers that end in a 5 are 5

Probability = required outcome / all possible outcome

In a probability, whenever you see the word 'or', you are to add

probability = 6/36 + 5/36 = 11/36