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There are two sets A and B each of which consists of three numbers in A.P. whose sum is 15. D and d are their respective common difference such that `D -d =1, D gt 0. If p /q=7/8` where p and q are the product of the number in those sets A and B respectively.
Sum of the product of the numbers in set B taken two at a time is :

A

52

B

54

C

64

D

74

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The correct Answer is:
D
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