The average weight of 6 persons increases by 1.5 kg when a new person comes in place of one of them who was weighing 65 kg. What is the weight of the new person?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 74 kg.
Calculations:
Let the average weight of new person be x
Sum of weight of 6 person be y
Sum = average × number
⇒ y × 6 - 65 + x = (y + 1.5) × 6
⇒ x - 65 = 9
⇒ x = 74