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The average age of A, B and C is 20 years, and that of B and C is 25 years. What is the age of A? |
25 years 10 years 15 years 20 years |
10 years |
Sum of ages of A, B and C = 20 x 3 = 60 Sum of ages of B and C = 25 x 2 = 50 Age of A = 60 - 50 = 10 years |
