Question 697240
There are twice as many boys as girls in the class.
let x = no. of girls
then
2x = no. of boys
and
3x = total number of students
:
 if 20% of the boys and 35% of the girls have already handed over their result cards, what percent of the students have not yet handed over their result cards?
:
{{{(.2(2x)+.35x)/(3x)}}} = {{{(.4x + .35x)/(3x)}}} = {{{(.75x)/(3x)}}}
Cancel x
{{{.75/3}}} * 100 = 25% of the students have handed theirs in, therefore
75% have not.