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    3. Quantitative Aptitude
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    5. Find the variance of the following data points: 6, 7, 5, 9, 12, 15

    Question

    Find the variance of the following data points:

    6, 7, 5, 9, 12, 15
    A 37/6 Correct Answer Incorrect Answer
    B 67/6 Correct Answer Incorrect Answer
    C 81/3 Correct Answer Incorrect Answer
    D 37/3 Correct Answer Incorrect Answer

    Solution

    6, 7, 5, 9, 12, 15 Mean = (5+6+7+9+12+15)/6 =54/6=9 6, 7, 5, 9, 12, 15 Deviation=     3, 2, 4, 0, 3, 6 Variance = (9+4+16+0+9+36)/6 =74/6 =37/3.

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    • RRB NTPC

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