Multiple choice

Find the new average weight of the class (in kg) if a student weighing 92 kg enters a class initially having 13 students having an average weight of 50 kg.

  1. 42

  2. 50

  3. 53

  4. 64
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Initial sum = 13 * 50 = 650. New sum = 650 + 92 = 742. New average = 742 / 14 = 53.

AI explanation

Calculate the total weight of the initial 13 students using the formula Total Weight = Average times Number of People, which is 50 times 13 = 650 kg. Adding the new student's weight of 92 kg makes the new total weight 742 kg for 14 students. Dividing 742 by 14 gives the new average weight of 53 kg. The result is 53.

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