Multiple choice

The average weight of 6 people increases by 7 kg when a new person comes in place of one of them weighing 75 kg. How much does the new person weigh?

  1. 88 kg

  2. 92 kg

  3. 95 kg

  4. 117 kg

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let total weight be W. (W - 75 + X) / 6 = W/6 + 7. X - 75 = 42. X = 117.

AI explanation

If the average weight of 6 people increases by 7 kg, the total overall weight must increase by 6 * 7 = 42 kg. The new person must weigh this extra 42 kg plus the 75 kg weight of the person being replaced. The weight of the new person is 42 + 75 = 117 kg.