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Total children = 50
Boys = 90% of 50 = 45
Girls = 50 - 45 = 5
Let x be the number of boys to be added.


BOYS GIRLS TOTAL
Initial 45550
BOYS Added x0x
Final45 + x550 + x



We want girls to be 5% of the new total:
  • 5 / (50 + x) = 1 / 20
  • 5 * 20 = 50 + x
  • 100 = 50 + x
  • x = 50
Answer: 50 boys need to be added.
Bunuel
In the Hillside summer camp there are 50 children. 90% of the children are boys and the rest are girls. The camp administrator decided to make the number of girls only 5% of the total number of children in the camp. How many more boys must she bring to make that happen?

A. 50.
B. 45.
C. 40.
D. 30.
E. 25.


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