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JEE Main & Advanced Mathematics Statistics Question Bank Self Evaluation Test - Statistics

  • question_answer
    The mean weight per student in a group of seven students is 55 kg. if the individual weights of six students are 52, 58, 55, 53, 56 and 54, then the weight of the seventh student is

    A) 55 kg

    B) 60 kg

    C) 57 kg

    D) 50 kg

    Correct Answer: C

    Solution :

    [c] The total weight of seven students is \[55\times 7=385\,\,kg\] The sum of the weights of six students is \[52+58+55+53+56+54=328kg\] Hence, the weight of the seventh student is  \[385-328=57kg.\]


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