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The true discount on a certain sum of money due 3 year hence is Rs.100 and the S.I. on the same sum for the same time and at the same rate is Rs.120. Find the sum and the rate percent.

(6 + 2/3)%
(5+ 2/3)%
(2+ 2/3)%
(4+ 2/3)%

Correct Answer: (6 + 2/3)%

Explanation:

Sum ⇒ Amount

A = (SI x TD)/(SI - TD)

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