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The average age of a husband and wife was 23 years when they were married 5 years ago. The average age of the husband, the wife and a child who was born during the interval, is 20 years now. How old is the child now?1). 9 months2). 1 year3). 3 years4). 4 years |
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Answer» Let present ages of husband, wife and CHILD be m, N and p years respectively. Given, ⇒ [(m – 5) + (n – 5)]/ 2 = 23 ⇒ m + n = 46 + 10 = 56 Given, ⇒ (m + n + p)/3 = 20 ⇒ m + n + p = 60 ⇒ 56 + p = 60 ⇒ p = 4 ∴ Child is 4 years old now. |
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