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Question

Answer

If there are 10u boys, there are ( 350 -10u) girls.

Given

1ou*60% = ( 350 -10u) * 40%

6u = ( 350 -10u)* 2/5

6u = 140- 4u

10u = 140

u = 14

10u = 140

350 – 140 = 210

210 – 140 = 70

There are 70 more girls than boys.

 

Check:

140 * 60% = 84

210 * 40 % = 84     checked.

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