Mrs. Brown gives two tests to her class. 30% of the class passed both tests and 45% of the class passed the first test. What percent passed the second test given that they passed the first test?

15%

30 percent passed BOTH testsOnly 15% passed ONLY first test

30/(30+15) = 67% of those who passed the first test ALSO passed the second test.

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

4444444444444 i think