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    Question

    In each of the following questions, a question is followed by three statements numbered I, II and III. Read all the statements and answer accordingly.

    What is the principal amount? Statement I: The

    Simple Interest after 2 years on a certain sum at 10% p.a is Rs. 1200. Statement II : The sum becomes double in 5 years in simple interest. Statement III: The difference between simple & compound interest on a certain sum for 2 years is Rs. 500
    A Only I Correct Answer Incorrect Answer
    B All I, II and III together Correct Answer Incorrect Answer
    C II and III together Correct Answer Incorrect Answer
    D only I and either I or II Correct Answer Incorrect Answer
    E I or II and III Correct Answer Incorrect Answer

    Solution

    From I: SI = 1200, here R & T are given. So Principal can be found. From II: P(100) →200 So interest % = 100% in 5 years So rate = 20% But we cannot find Principal by alone II. From III: Difference between Si & CI for 2 years= PR × R/100 × 100 By using II &III , we can get the P

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