Find the rate of interest (in %) if simple interest earned o

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SSC CGL Tier-2 9-March-2018 Maths Shift-2
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MATH

100

M: +3.00/-0.00

Find the rate of interest (in %) if simple interest earned on a certain sum for the 3 years is Rs 900 and compound interest earned in 2 years is Rs 636?

[SSC CGL Tier-2 9-March-2018 Maths Shift-2]

A 12

B 10

C 9

D 8