The average weight of 13 students and their teacher is 24.5 kg. To the weight of the teacher is 31 kg. then what is the average weight of the 13 students?
Answer & explanation
Correct answer: option 3
Sum of weight of 13 students and 1 teacher = 14 × 24.5 = 343 kg
Weight of teacher = 31 kg
Sum of weight of 13 students = 343 - 31 = 312 kg
Average weight of students = \(\frac{312}{13}\) = 24 kg