The average weight of a group of 8 children is 25.6kg . The average weight of another group of 12 children is 26.2 kg. Find the average weight of the group of 20 children
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Solution
We need to find combined average here.
Combined Average = Xc= (n1×x1+n2×x2)÷n1+n2
Given, n1= 8
x1=25.6
n2=12
x2=26.2
Putting values in formula
= (8×25.6+12×26.2)÷8+12
= (204.8+314.4)÷20
= 519.2÷20
= 25.96 Answer
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