The ratio of the number of boys to that of the girls in a school of 432 students is 5:4. How many new girls should join the school for the ratio to be 1:1.
A
16
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B
68
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C
116
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D
48
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Solution
The correct option is C48 Number of boys =59×432=240 Number of girls =432−240=192. Let the number of new girls be x. Then, 240192+x=11⇒240=192+x⇒x=48.