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The number of ordered pairs (m,n),m,n in...

The number of ordered pairs `(m,n),m,n in{1,2,...,100}` such that `7^m + 7^n` is divisible by 5 is

A

`1//5`

B

`1//7`

C

`1//4`

D

`1//49`

Text Solution

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The correct Answer is:
C
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