Q: Three years ago, the average age of a family of 5 members was 17. A baby having been born, the average age of the family is the same today. What is the age of the child?\nOptions:\n(A) 3\n(B) 2\n(C) 4\n(D) 1\n(E) 5 Let's give some random thoughts before answering.
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Present age of 5 members = 5 x 17 + 3 x 5 = 100 years\nAlso, present ages of 5 members + Age of the baby = 6 x 17 = 102 years\nAge of the baby = 102 – 100 = 2 years.
Therefore, the answer is (B).
Assistant