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The average age of women and child workers in a factory was 20 year. The average age of all the 12 children was 8 year and average age of women workers was 26 year. If 9 women workers were married, then the number of unmarried women workers was.
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Women workers = x 26x + 12 x 8 = 20 (12+x) ⇒ 26x + 96 = 240 + 20x ⇒ 6x = 144 ∴ x = 24 ∴ Unmarried women workers = 24 – 9 = 15
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