1. 71.
2. 19.
Problems to solve:
1. 2 years ago, the average age of a family of 6 members was 20 years. A child having been born, the average age of the family is the same today. The present age of the child is:
2. The average age of husband, wife and their child 2 years ago was 30 years and that of wife and the child 4 years ago was 25 years. The present age of the husband is:
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