The average age of a husband-wife and their son was 42 years. The son got married and exactly after 1 year a child was born to them. When the child became 5 years old, the average age of the family became 36 years. What was the age of bride at the time of marriage?
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total age of Husband + wife + son = 42 x 3 = 126
after 6years (1+5) total age of Husband + wife + son = 126 + 6 + 6 + 6 = 144
after 6years total age of Husband + wife + son + bride + child = 36 x 5= 180
current age of bride = 180 - (144 + 5) = 180 - 149 = 31
6years back ie at the time of marriage, bride's age = 31 - 6 = 25years
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