Question

4. There are 50 students in a class out of them 28 are
boys. The mean weight of boys is 42 kg and the
mean weight of girls is 37 kg. Find the mean
weight of all the students in the class. (3 marks)
Hints: (i) First find the number of girls. (ii) Find
the total weight of boys and girls and solve.
Solution:​

Answer 1

Answer:

39.8 kg

Step-by-step explanation:

Total weight of girls = 22 x 37 = 814

Total weight of boys = 28 x 42 = 1176

Total weight = 814 + 1176 = 1990

∴Mean Weight = 1990/50

Mean Weight = 39.8 kg

Hope it helps ;)

Answer 2

Answer:

No. of girls =22, No. of boys =28.

Step-by-step explanation:

Weight of boys in all is 28into42 which is 1176.

Weight of girls in all is 22into37 which is 814.

Total weight of all boys and girls is1176+814=1990. ANS=1990kg.

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