Question

A teacher gave his class two quizzes; 80% of the class passed the first quiz, but only 60% of the class passed both quizzes. What percent of those who passed the first quiz also passed the second quiz?

Answer 1

Help please I'm stumped

Answer 2

Ok, after working this out I believe I've gotten it. The way I went about this is imagining that it was a class of 20 students. If 80% of the class passed the first quiz, that means 16 of them passed. If 60% of the class passed both, then that means 12 passed both. So all that's left to look for is the percentage of people who passed the second out of those who passed the first. Which we would write out in fraction form as \[\large \frac{12}{16}\]

Answer 3

oh okay yeah that makes sense