Multiple choice

The average weight of 35 students is 24 kg., if the weight of the teacher is included, the average weight rises by 400 gm. Find the weight of the teacher.

  1. 30 kg.

  2. 34 kg.

  3. 38 kg.

  4. 42 kg.

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

Total weight of 35 students = 35 × 24 = 840 kg. With teacher, total weight = 36 × 24.4 = 878.4 kg. Teacher's weight = 878.4 - 840 = 38.4 kg, which rounds to 38 kg. Option C is correct.