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The average weight of a class of 40 stud...

The average weight of a class of 40 students in 30 and the average weight of a class of 20 students is 15. Find the average weight of both the combined classes:

A

20

B

25

C

17.5

D

15

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The correct Answer is:
B
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The average weight of boys in a class is 30kg and the average weight of girls in the same class is 20kg. If the average weight of the whole class is 23.25kg ,what could be the possible strength of boys and girls respectively in the same class? (a) 14 and 26 (b) 13 and 27 (c) 17 and 27 (d) None of these

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:

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  • The average weight of a class of 40 students is 30 and the average weight of a class of 20 students is 15. Find the average weight of both the combined classes :

    A
    20
    B
    25
    C
    17.5
    D
    15

  • 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

  • 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`

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    The average weight of a class of 15 boys and 10 girls is 38.4 kg . If the average weight of the boys is 40 kg, then what is the average weight of the girls ?

    The average weight of boys in a class is 30 kg and the average weight of girls in the same class is 20 kg. If the average weight of the whole class is 23.25 kg, what could be the possible strength of boys and girls respectively in the same class ?

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    The average weight of the boys in a class is 30kg and the average weight of girls in the same class is 20kg. If the average weight of the whole class is 23.25kg, what could be the possible strength of boys and girls respectively in the same class?

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