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?
A114 kg
B112 kg
C108 kg
D110 kg
Answer:
D. 110 kg
Explanation:
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