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I=Pn(n+1)r/2400 gives ₹3.90 after entering r=0.06 for 6%. Correct interest?

A₹3,900

B₹390

C₹0.39

D₹39

Answer & Solution

Correct answer: B. ₹390

The formula requires the numerical percent 6, so correcting the input multiplies interest by 100.

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