New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    The average of a group of

    observations is 34.4. If every observation is scaled by a factor of 2.5, what will the resulting average become?
    A 56 Correct Answer Incorrect Answer
    B 74 Correct Answer Incorrect Answer
    C 86 Correct Answer Incorrect Answer
    D 60 Correct Answer Incorrect Answer

    Solution

    ATQ, If each observation is multiplied by 'x', then the new mean becomes 'x' times of average. Therefore, new average = 34.4 × 2.5 = 86

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