Question : The average weight of 5 men decreases by 3 kg when one of them weighing 150 kg is replaced by another person. Find the weight of the new person.
Option 1: 125 kg
Option 2: 100 kg
Option 3: 120 kg
Option 4: 135 kg
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Correct Answer: 135 kg
Solution :
Given, the average weight of 5 men decreases by 3 kg when one of them weighing 150 kg is replaced by another person.
When the average weight of 5 men decreases by 3 kg, the total sum of weight should reduce by 5 × 3 kg = 15 kg
So, the new weight should be 15 kg less than 150 kg.
⇒ New weight = 150 kg – 15 kg = 135 kg
Hence, the correct answer is 135 kg.
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