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In a class of 60, where girls are twice that of boys , Kamal ranked seventeenth from the top . If there are 9 girls ahead of Kamal , how many boys are after him in rank ?

Correct Answer: 12
Q. In a class of 60, where girls are twice that of boys , Kamal ranked seventeenth from the top . If there are 9 girls ahead of Kamal , how many boys are after him in rank ? Let, No. of boys = xAs per question,x + 2x = 60∴ x = 20∴ No. of boys = 20 and No. of girls = 40As Kamal ranked 17th from the top, so there are 16 students ahead of him (including 9 girls).that means, there are 7 boys and 9 girls ahead of Kamal.Now, till 17th there are (7 boys + Kamal) = 8 boysSo, remaining boys that ranked after Kamal = (20-8) = 12 boys (Ans:) 

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