Question

At michael’s school, 38% of the students have a pet dog and 24% of the students have a pet cat. michael found that 11% of the students had both a pet dog and a pet cat. what is the probability that a randomly chosen student at michael’s school will have a pet dog or a pet cat?

Answer 1

0.51 or 51%.

Explanation:

If there were 100 students in the school, then 38 have a dog 24 a cat and 11 have both.

So there are 38 - 11 = 27 who only have a dog and 24-11 = 13 who only have a cat.

So total number having a pet = 27+11+13

= 51 students.

So Prob(You will choose a student with a pet) = 51%.

Drawing a Venn diagram would help to answer this and make it clearer.

Answer 2

Answer: answer above me is correct