Multiple choice

In an office, the average weight of male is 45 and that of the total is 5 less than that of male. If the number of female is one-third less than that of male, find the average weight of female.

  1. 30

  2. 22.5

  3. 35.5

  4. 32.5

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Male average = 45 kg. Total average = 45 - 5 = 40 kg. Females are one-third less than males, so if males = 3x, females = 2x. Total people = 5x. Total weight = 5x × 40 = 200x. Male weight = 3x × 45 = 135x. Female weight = 200x - 135x = 65x. Female average = 65x / 2x = 32.5 kg.

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