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Discussion

  1. The average age of women and child workers in a factory was 15 yr. The average age of all the 16 children was 8 yr and average age of women workers was 22 yr. If 10 women workers were married, then the number of unmarried women workers was.
    1. 16
    2. 12
    3. 8
    4. 6
  1. Correct Option: D

    Let the number of women workers be Y.

    Then, 22y + 16 x 8 = 15 (16+y)
    ⇒ 22y + 128 = 240 + 15y
    ⇒ 22y - 15y= 240 - 128
    ∴ y = 16

    ∴ Unmarried women workers = 16 - 10 = 6

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