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If the mean weight of 10 students is 25 ...

If the mean weight of 10 students is 25 kg and the mean weight of another 10 students is 35 kg, then the mean weight of 20 students is _______.

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The correct Answer is:
30 kg
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The mean weight of 20 students is 25 kg and the mean weight of another 10 students in 40 kg . Find the mean weight of the 30 students .

If the total weight of 25 students is 625 kg, then mean weight of 25 students is ___________

Knowledge Check

  • The average weight of 55 students is 55 kg , and the average weight of another 45 students is 45 kg . Find the average weight of all the students .

    A
    48 kg
    B
    50 kg
    C
    50.5 kg
    D
    52.25 kg

  • The mean weight of 60 students of a class is 52.75 kg. If the mean weight of 25 of them is 51 kg., find the mean weight of remaining students.

    A
    58 kg
    B
    56 kg
    C
    54 kg
    D
    51 kg

  • If the average weight of a class of students is 15 and the average weight of another class of students is 30, then find the ratio of the students of the first class to the another class of 30 students when the average weight of both the classes is 25 :

    A
    `1:2`
    B
    `2:1`
    C
    `1:3`
    D
    `3:4`

    • Similar Questions

    Explore conceptually related problems

    Find the mean weight of 20 students in your class.

    The mean weight of 25 students of a class is 52 kg. if the mean weight of the first 13 student of the class is 48 kg and that of the last 13 students is 55kg , find the weight of the 13th student.

    If the average weight of 6 students is 50 kg , that of 2 students is 51 kg and that of rest of 2 students is 55 kg , then the average weight of all the students is

    If the average weight of the class of students is 15 and the average weight of another class of students is 30, then the find the ratio of the students of the first class to the another class of 30 students when the average weight of both the classes is 25:

    In a class of 25 boys and 20 girls, the mean weight of the boys is 40 kg and the mean weight of the girls is 35 kg. Find the mean weight of the class. The following are the steps involved in solving the above problem. Arrange them in sequential order. (A) The total weight of 25 boys = 25 xx 40 = 1000 kg The total weight of 20 girls =20 xx 35 = 700 kg (B) The mean weight of the class = (1700)/(45) = 37(7)/(9) kg (C) The total weight of 45 students = 1000 kg + 700 kg = 1700 kg

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