School year

At the end of the school year, 20% of the 250 children who attended school were awarded. Award got 18% of boys and 23% of girls. Find how many boys and how many girls attend school.

Correct answer:

x =  150
y =  100

Step-by-step explanation:

q=20%=10020=51=0.2 q1=18%=10018=509=0.18 q2=23%=10023=0.23 n=250  x+y=n q1 x+q2 y=q n x+y=250 0.18 x+0.23 y=0.2 250  x+y=250 0.18x+0.23y=50  Row20.18 Row1Row2 x+y=250 0.05y=5  y=0.055=100 x=250y=250100=150  x=150 y=100

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