What is the annual rate of interest (per annum)? I. ₹ 6,200 earns ₹ 1,736 simple interest in 2 years. II. ₹ 4,500 earns ₹ 1,348.20 compound interest in 2 years.
Verbal Reasoning
Data Sufficiency
Difficulty: Easy
Choose an option
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AStatement I alone is sufficient; Statement II alone is not
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BStatement II alone is sufficient; Statement I alone is not
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CEither Statement I alone or Statement II alone is sufficient
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DBoth statements together are not sufficient
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ENone of these
Answer
Correct Answer: Either Statement I alone or Statement II alone is sufficient
Explanation
Introduction / Context:Determine r uniquely from either SI or CI data over 2 years.
Calculations:
- I: r = SI / (P * t) = 1736 / (6200 * 2) = 0.14 ⇒ 14% p.a.
- II: For 2 years, CI = P[(1 + r/100)^2 − 1]. Solve (1 + r/100)^2 − 1 = 1348.20 / 4500 = 0.2996 ⇒ (1 + r/100)^2 = 1.2996 ⇒ r ≈ 14% (unique, positive).
Final Answer:Either statement alone is sufficient.