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Q.

Out of a certain sum, 1/3 rd is invested at 3%, 1/6 th at 6% and the rest at 8%. If the simple interest for 2 years from all these investments amounts to ₹600, find the original sum.

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a

₹4000

b

₹7000

c

₹6000

d

₹5000

answer is B.

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Detailed Solution

Rest part =1−13+16=12

Rate % per annum on total sum

=13×3+16×6+12×8=6%

∴P=600×1006×2=₹5,000

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