What sum of money put at C.I amounts in 2 years to Rs.8820 and in 3 years to Rs.9261?
Correct answer: A. Rs.8000
- A. Rs.8000
- B. Rs.8400
- C. Rs.7500
- D. None
Explanation
The amount grows from Rs.8820 in year 2 to Rs.9261 in year 3, so the one-year growth factor is Rs.9261/Rs.8820 = 1.05, giving a 5% rate. The original sum is Rs.8820/(1.05)² = Rs.8000. Students may choose Rs.8400 by dividing by only one year's factor.
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Percentages express a quantity as parts per hundred and support calculations involving increases, decreases, discounts, commissions, taxes, and successive changes. Questions require distinguishing percentage change from percentage points and identifying the original value when a final value and its percentage change are given.
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