REET Feb 16 p1, Q92
0. The average of 3 numbers is 7 and average of first two numbers is 4. What is the third number?
- Option : B
- Explanation : As, Total of three numbers
= 3 x 7 = 21
Total of first two numbers = 4 x 2 = 8
∴ Third number = 21 - 8 = 13.
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