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    Question

    Five friends each contributed Rs. 70. If the sixth

    friend gives Rs. 50 more than the average contribution of all six, how much did the sixth friend contribute?
    A 180 Correct Answer Incorrect Answer
    B 168 Correct Answer Incorrect Answer
    C 130 Correct Answer Incorrect Answer
    D 118 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the contribution of the sixth friend be Rs. 'p'. So, (70 ├Ч 5 + p) ├╖ 6 + 50 = p Or, (350 + p) ├╖ 6 = p - 50 Or, 350 + p = 6 ├Ч (p - 50) Or, 350 + p = 6p - 300 Or, 5p = 650 Or, p = 130

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