Question

The average weight of a class of 40 students is
30 kg & the average weight of class of 20
students is 15 kg. find the average weight
of both the class combined.​

Answer 1

Answer:

25 kg.

Step-by-step explanation:

Average weight of students of both the classes combined=

(The weight of students of both the classes combined) ÷ (No.of students in both the

classes combined.)

No. of students in both the calsses combined=40+20=60.

Now, we know that,

Average=Sum of observations÷total no.of observations.

From this formula, we can derive the formula of sum of observations,

So, Sum of observations=Average×No.of observations.

So,Total weight of students in both the classes combined=(40×30)+(20×15).

=1200+300

=1500kg.

Average weight of both the classes combined=1500/60.

=25kg (ANSWER)

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