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One day, 90 students were travelling in ...

One day, 90 students were travelling in a bus and the ratio of the number of boys to that of girls was 2 : 1, The next day, the number of students remained the same, but the ratio of the number of boys to that of girls became 3 : 2. What was the difference between the number of boys travelling in the bus on both the days?

A

6

B

18

C

14

D

30

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The correct Answer is:
A
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