Question

The average weight of 24 students is 35kgs. If the weightof the teacher is included the average increases by 400g. What is the weight of the teacher?

Answer 1

Answer:

45 kg

Step-by-step explanation:

25×35.4 - 24×35

(24+1)×(35+0.4) - 24×35

24×35 + 9.6 + 35 + 0.4 - 24*35

45

Answer 2

45kg

Total weight of 24 students =24×35=840kg

Total weight of 25 persons with teacher =25×35.4=885kg.

∴ Weight of teacher =(885−840)kg=45kg.