Multiple choice

When a man weighing 75 kg is replaced by another man in a group of 20 persons, the average weight decreases by 2 kg. What is the weight of the new man?

  1. 30 kg

  2. 32 kg

  3. 34 kg

  4. 35 kg

  5. 31 kg
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Using the shortcut formula:

Weight of the new man - weight of the removed man = NX 

Where, N = number of men in the group and X = increase or decrease in average 

Weight of the new man - 75 = 20(-2)

Weight of the new man = 75 - 40

= 35 kg

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