The average weight of Group A and Group B is 12kg and 24 kg respectively. The ratio of members in group A to group B is 1 : 2. Find the combined average of both the groups.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 20 Kg.
We know that,
Average = Sum of observations/total number of observations
Now,
Let the number of members of groups A and B be x and 2x
Sum of weight of group A = 12 × x = 12x
Sum of weight of group B = 24 × 2x = 48x
Required average = (12x + 48x)/(x + 2x) = 60x/3x = 20 kg