Question
Average age of 3 children born at intervals of 2 years
is 8. How old is the eldest child?Solution
Let the age of three children are x, (x + 2) and (x + 4) The average age of 3 children = 8. According to the question [x + x + 2 + x + 4] = 3 x 8 Â 3x + 6 = 24 3x = 24-6 Â 3x = 18 x = 6 Age of the eldest son = 6 + 4 = 10 years.
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