Suppose that 2% of the students in a school have head lice and the test for head lice is accurate 85% of the time

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.

1.3 and 1 1/3 are both closest to 1. hope this ; )