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Question

# The total students in the three sections of a class are in the ratio 2:3:5. If the strength of each section is increased by 20, the ratio changes to 4:5:7. What was the total strength of the class before the admission of new students?

A

80

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B

20

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C

40

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D

100

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E

50

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Solution

## The correct option is D 100 Let 2x, 3x, 5x be the total number of students in the class before new admissions. Given that 2x+203x+20 = 45 So, x = 10 ∴ total no. of students before new admissions = 10x = 100

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