+176 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?
+313 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
