The mean of 2/5 , 5/7 , 3/5 and 2/7 is...

The mean of `2/5 , 5/7 , 3/5 ` and `2/7` is ........

A

`1/2`

B

`3/5`

C

`5/7`

D

`2`

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The correct Answer is:

A, B

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