The average age of a family of 5 members, three years ago, was 17 years. In spite of the birth of a…
Three years ago the total age of the 5 members was \(5\times17=85\) years, so today those five total \(85+15=100\) years. The present total for 6 members at an average of 17…
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The average age of a family of 5 members, three years ago, was 17 years. In spite of the birth of a child in the family during these 3 years, the present average age of the family remains the same. What is the present age of the child?
Answer and explanation
Correct answer A
Three years ago the total age of the 5 members was years, so today those five total years. The present total for 6 members at an average of 17 is 102 years. The child's age is years.
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