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    5. If the average of 38, 49, 42, and 'b' is 50, then find the value of '2b'.

    Question

    If the average of 38, 49, 42, and 'b' is 50, then find

    the value of '2b'.
    A 142 Correct Answer Incorrect Answer
    B 165 Correct Answer Incorrect Answer
    C 120 Correct Answer Incorrect Answer
    D 124 Correct Answer Incorrect Answer

    Solution

    ATQ, 38 + 49 + 42 + b = 50 × 4 Or, 129 + b = 200 Or, 'b' = 71 Therefore, the required value = '2b' = 2 × 71 = 142

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