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21. The sum of the ages of husband and his wife is four times the sum of the ages of their children. Four years ago, the ratio of the sum of their ages of the sum of the ages of their children was 18:1.Two years hence the ratio will be 3:1.How many children do they have? |
| Answer» 21. The sum of the ages of husband and his wife is four times the sum of the ages of their children. Four years ago, the ratio of the sum of their ages of the sum of the ages of their children was 18:1.Two years hence the ratio will be 3:1.How many children do they have? | |