Question

In a class of 25 students 15 are boys, the mean weight of boys is 50kg and that of girls is 45kg. what is mean weight of class.​

Answer 1

Answer:

1200 kg

Step-by-step explanation:

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Answer 2

Given - Mean weight of boys and girls

Find - Mean weight of class

Solution - The mean weight of the whole class is 48 Kilograms.

The mean weight is calculated by the formula =

Mean = sum of all weights/total number of weights.

Boys are 15 in number.

50 = sum of weights of boys/15

Sum of weights of boys = 50*15

Sum of weights of boys = 750 kilograms

Girls = 25 - 15

Girls = 10

45 = Sum of weights of girls/10

Sum of weights of girls = 45*10

Sum of weights of girls = 450 kilograms

Mean weight of whole class = (450+750)/25

Mean weight of whole class = 1200/25

Mean weight of whole class = 48 kilograms

Thus, the mean weight of the whole class is 48 Kilograms.