Question

The average weight of 48 students of a class is 36 kg. If the weights of teacher and principal is included. The average becomes 36.76 kg. Find the sum of the weights of teacher and principal?

• A. 108 kg
• B. 112 kg
• C. 110 kg
• D. 114 kg

Answer 1

Answer:

C. 110 kg

Sum of weights of teacher and principal = New avg. × No. of students – Existing avg. × No. of students = 36.76 × 50 – 36 × 48 = 1838 – 1728 = 110 kg