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Arithmetic

Averages

Easy

The average of three numbers is 19 while the average of two of these numbers is 21.25. What is the value of the third number?

15.5

14.5

13.5

12.5

✅ Correct Option: 2

$19 \times 3 - 21.25 \times 2 = 57 - 42.5 = 14.5$

Solution