The average of three numbers is 20. If two numbers are 16 and 22, the third is?
- 18
- 20
- 22
- 19
Explanation
To find the third number:
The average of three numbers is 20. Therefore, the sum of these three numbers is
20×3=60.
The sum of the two given numbers (16 and 22) is
16+22=38.
Subtract this sum from the total sum to find the third number:
60−38=22.
So, the third number is 22.
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