Out of two sections A and B, 10 students...

Out of two sections A and B, 10 students of section B shift to A, as a result strength of A becomes 3 times the strength of B. But, if 10 students shift over from A to B, both A and B become equal in strength. Ratio of the number of students in section A that of section B is

`2 : 1 `

`5 : 3`

`3 : 1`

`9 :4`

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