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    Question

    If 5th term of an AP is 20 and 10th term is 45, find

    25th term.
    A 100 Correct Answer Incorrect Answer
    B 120 Correct Answer Incorrect Answer
    C 145 Correct Answer Incorrect Answer
    D 165 Correct Answer Incorrect Answer

    Solution

    ATQ, a + 4d = 20, a + 9d = 45 → 5d = 25 → d = 5 → a = 0 → T₂₅ = 0 + 24×5 = 120 .

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