OUT OF 1200 PUPILS IN A SCHOOL 900 ARE BOYS AND THE REST ARE GIRLS. IF 20 % OF THE BOYS AND 30 % OF THE GIRLS WEAR SPECTACLES, FIND HOW MANY PUPILS IN ALL WEAR SPECTACLES AND WHAT PERCENT OF THE TOTAL NUMBER OF PUPILS WEAR SPECTACLES.

Answer 1

22.5%

Answer 2

In 1,200 students only 330 students wear spectacles then among 100 students the number will be 27.5 that means 27.5% students wear spectacles.

Answer 3

are you sure I just checked my again, but I got the same thing I might be doing something wrong.

Answer 4

boys wearing glasses = .2(900) = 180
girls wearing glasses = .3(300) = 90
total wearing glasses = 270
percentage of total wearing glasses = 270/1200 = .225 or 22.5%

Answer 5

yes I was right