Sharon, if 2/3 of the girls wear red, then 1/3 does not, right?
3 out of 4 students are girls. 1 girl out of 3 does not wear red, so 1/4 of the students are girls not wearing red.
One out of four students are boys. Half of them don't wear red, so half do. Half of 1/4 is 1/8, right?
Sooooo, 1/4 + 1/8 of the students don't wear red, or 2/8 + 1/8 = 3/8 of the students are not wearing red.
Draw 8 boxes. Three of those boxes total 330, so one must equal 110. Eight boxes of110 equal 880 total students.
