Question

in a class of 25 students, 15 of them have a cat, 16 of them have a dog and 3 of them have neither. find the probability that a student has a cat and dog

Answer 1

9/25

Explanation:

this is a two sets problem first you find x and subtract it's from the numbers given that is 15 and 16 and when you find them you will get the x which is the number that had both of the cat and the dog and that number is what you're going to use to divide a 25 so that's how I got the 9 / 25