In a class of 60 where number of girls are twice that of boys kamal ranked seventeenth from the top If there are 9 girls before of kamal how many boys are after him in rank?
A
3
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B
7
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C
12
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D
23
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Solution
The correct option is C 12 Number of boys=20 Number of girls= 40 Number of students behind kamal in rank = 60-17=43 Number of girls ahead of kamal in rank = 9 Number of girls behind kamal in rank = 40-9=31 Number of boys behind kamal in rank = 43-31=12.