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Two dice A and B are rolled .Let the num...

Two dice A and B are rolled .Let the number obtained on A and B be alpha and beta respectively. if the variance of `alpha-beta is p/q` , where `p` and `q`are co-prime , then the sum of the positive divisors of p is equal to

A

`36`

B

`48`

C

`31`

D

`72`

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