combined average
Level
2
The average age of 5 girls is 35 and the average of another 4 girls is 40. What would be the combined average.
The answer is 37.2.
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1 solution
Total age of 5 girls is 35×5=175, Again age of other 4 girls is 40×4=160, Total age=175+760=335 Average=335/(5+4)=37.222(approx)