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The average age of 3 children in a fa...

The average age of 3 children in a family is 20% of the average age of the father and the eldest child. The total age of the mother and the youngest child is 39 years. If the father’s age is 26 years, what is the age of the second child? (a) 15 years   (b) 18 years   (c) 20 years   (d) Cannot be determined

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