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22 Jul 2025, 22:00
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
85% (01:47) correct
15%
(02:33)
wrong
based on 126
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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.
A. 50.
B. 45.
C. 40.
D. 30.
E. 25.
22 Jul 2025, 22:29
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Currently, there are 45 boys and 5 girls
Let's say we add X boys more to make proportion of girls as 5%
5/(45 + 5 + X) = 5% = 1/20
X = 50
(A) is the answer
Let's say we add X boys more to make proportion of girls as 5%
5/(45 + 5 + X) = 5% = 1/20
X = 50
(A) is the answer
23 Jul 2025, 18:02
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Currently No. Of Boys = 90 % of 50 =45
No. of girls = 50-45=5
acc to question: they want these 5 girls to be 5% of the total children.
From here we can simply understand that the total needs to be 100 so that 5 can be 5%.So the no. of boys needed to be added is 50.
OR
We can solve it like
5/50+x= 5/100
50+x=100
x=50 (option A)
No. of girls = 50-45=5
acc to question: they want these 5 girls to be 5% of the total children.
From here we can simply understand that the total needs to be 100 so that 5 can be 5%.So the no. of boys needed to be added is 50.
OR
We can solve it like
5/50+x= 5/100
50+x=100
x=50 (option A)
Bunuel
23 Jul 2025, 23:24
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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.
We want girls to be 5% of the new total:
Boys = 90% of 50 = 45
Girls = 50 - 45 = 5
Let x be the number of boys to be added.
| BOYS | GIRLS | TOTAL | |
| Initial | 45 | 5 | 50 |
| BOYS Added | x | 0 | x |
| Final | 45 + x | 5 | 50 + 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
Bunuel
