Question

In a class of 90 where boys are twice that of girls, Purvi ranked ${13}^{th}$ from the top. If there are 7 boys ahead of Purvi, how many girls are after her in the rank?

• A. 18
• B. 20
• C. 24
• D. 22

Answer 1

The correct option is C 24

Let the number of girls be x. No. of boys = 2x.
So, x + 2x = 90 or x =30.
So, number of girls = 30 and number of boys = 60.
Number of students behind Purvi in rank = (90 – 13) = 77.
Number of boys behind Purvi in rank = (60 – 7) = 53.
So, Number of girls behind Purvi in rank = (77 – 53) = 24.