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A group of 400 students took certain examination.60% of boys 80% of girls had cleared the cutt off in the examination. if the total % of students

qualifying is 65%, then how many girls appeared in the exam?
A) 100 B)150 C)200 D)250 E)300


Let Boys be x, and girls be y.
So total , x+y=400

60x/100 boys cleared and 80y/100 girls.

now  {( 0.6x +0.8y)/400 }*100= 65

0.15x +0.2y =85

and y=100(girls)
2 3 2
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