In a class of 60 where boys are twice the girls. Alia ranked 17th from the top. If there are 9 boys ahead of Alia, how many girls are after him in the rank?
A ) 12 ✅
B ) 13
C ) 10
D ) 15
Explanation:
Let the number of boys be x Then the number of girls = 2x x + 2x = 60 3x = 60 x = 20 So, the number of boys =20 number of girls = 40 Number of students behind Alia in rank (60-17) = 43 Number of girls ahead of Alia in rank = 9 Number of girls behind Alia in rank = (40−9) =3 1 Number of boys behind Kamal in rank = (43−31) = 12