There are twice as many boys as girls in an economics class. 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 cards?
(A) 75 (B) 65 (C) 55 (D) 15
Answers
Answered by
1
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Answered by
10
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
2(2x)+35x the whole by 3x
=4x+35x the whole by 3x
=75x by 3x
75xby3x * 100 = 25% of the students have handed theirs in, therefore
75% have not
let x = no. of girls
then
2x = no. of boys
and
3x = total number of students
2(2x)+35x the whole by 3x
=4x+35x the whole by 3x
=75x by 3x
75xby3x * 100 = 25% of the students have handed theirs in, therefore
75% have not
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