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The following Questions are based on inter-se ranking between two people or a group of people. 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?

The following Questions are based on inter-se ranking between two people or a group of people. 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

In a class of 60, where girls are twice that of boys.

Let the number of boys be 'a'.

So, number of girls is '2a'.

According to question:

a + 2a = 60

⇒ 3a = 60

⇒ a = 60 ÷ 3

⇒ a = 20

So, there are 20 boys and 40 girls in the class.

Kamal ranked seventeenth from the top. 

If there are 9 girls ahead of Kamal.

So, number of boys ahead of Kamal = (17 - 9) - 1

= 7

Therefore, number of boys behind of Kamal = 20 - 8

= 12

Hence, '12' is the correct answer.

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