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Some children sat for a selection test for a direct school admission. There were 15 more boys than girls in the group. 3/4 of the girls and 4/5 of the boys passed the test. There were 2 more girls than boys who failed the test. How many children say for the selection test?

 Aug 6, 2021
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assume girls are x, boys are (15+x)

 

  1/4x - 1/5 (15+x) = 2

      1/4x - 1/5x = 5

                1/20x = 5

                       x = 100

 

15 + x = 115

 

sum = 115 + 100 = 215

 Aug 6, 2021

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