Question

A grading machine can grade 96 multiple choice tests
in 2 minutes.

Answer 1

Hello!

I'll help you to solve this problem.

Remember that when posting questions here, you have to write the complete question in order to get a great and correct answer. Anyway, I found the complete question and is as follows:

A grading machine can grade 96 multiple-choice tests in 2 minute. How long will it take the machine to grade 300 tests?

So this problem can be used by using proportions. So we have that a grading machine can grade 96 multiple-choice tests in 2 minute. So we need to find the time (t) it takes the machine to grade 300 tests. So:

`(2)/(96)=(t)/(300) \\ \\ Isolating \ t: \\ \\ t=300(2)/(96) \\ \\ t=6.25 minutes`

Hence, it would take the machine 6.25 minutes, that is, 6 minutes and 15 seconds to grade 300 tests.