Question

There are 40 people at a reception for international students. The students, boys and girls, are from Peru and China. 18 of all the students are boys, and 12 of all the students are Peruvian. 17 of the Chinese are girls. Given that a student is a boy, what is the probability that he is Chinese? A Venn diagram will help you to answer this question.

Answer 1

Make a grid like this
It's more helpful than a Venn.
Now fill in the blanks and you'll figure out the answer