Math, asked by CapAllan5121, 5 months ago

Find the average of 12numbers if the average of the first nine numbers is 21 and pond the average of last three number is 17

Answers

Answered by ajayveer1289
0

Answer:

20

Step-by-step explanation:

9×21=189

3×17=51

sum=240

240÷12=20

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