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Question

# In a school out of 500 students, 60% are boys and 40% are girls. If 40 boys leave school and 20 new girls are admitted. What is the new percentage of boys in the school?

A
50
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B
52
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C
45.83
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D
54.16
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Solution

## The correct option is D 54.16Given that, Total number of children in a school = 500 Number of boys in the school = 60% of 500 =60100×500=300 Number of girls in the school = 40% of 500 =40100×500=200 Now, as given that 40 boys leave school and 20 girls are newly admitted in the school, ∴ Number of boys left = 300 - 40 = 260 ∴ Number of girls left = 200 + 20 = 220 Now, total number of children in the school = 260 + 220 = 480 ∴ Percentage of boys in the school =numberofboystotalnumberofchildren ×100 =260480 ×100 =54.16%

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