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Railways Quantitative Aptitude Average Sample Paper Average & Problems on Ages Sample Test Paper-7

  • question_answer
    The average of 30 observations is 45. If three new observations 42, 44 and 48 be added, find the new average.

    A)  42.9                

    B)  40.1

    C)  42.4                

    D)  44.9

    Correct Answer: D

    Solution :

    [d] Total of 30 observation \[=45\times 30=1350\] Total of 33 observation \[=1350+42+44+48\]                                     = 1484 New average \[=\frac{1484}{33}=44.97\]


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