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CUET
General Test
Numerical Ability
Average
Average of a, b and c is 9. Average of b and c is 10. What is the value of a?
6
7
8
9
Sum of age of a,b & c = 3 × 9 = 27 years
Sum of age of b & c = 2 × 10 = 20 years
Age of a = 27 - 20 = 7 years