If the number of quantities in group A is 10 and in group B is 8, and their individual average is 24 and 16 respectively, find the combined average of the two groups.

July 29, 2023

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Question	If the number of quantities in group A is 10 and in group B is 8, and their individual average is 24 and 16 respectively, find the combined average of the two groups.
Type	multiple_choice
Option	20.44	correct
Option	18.22	incorrect
Option	16.22	incorrect
Option	18.66	incorrect

Solution :

The combined average of the two groups is =

=(10*24+8*16)/(10+8)
= (240+128)/18
= 368/18
= 20.44

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