The average weight of 120 students is 22 kg. The average weight of first 59 students is 21 kg and of last 60 students is 23 kg. What is the weight of the 60th student?
Answers
Answered by
1
Answer:
21 kg
Step-by-step explanation:
The total weight of 120 students is (120X22)kg =2640kg
The total weight of first 59 students is (59X21)kg= 1239kg
The total weight of last 60 students is (60X23)kg=1380kg
The total weight of rirst 59 & last 60 students is ( 1239+1380) kg= 2619kg
Here the weight of the 60th student is excluded in the total weight of the first 59 & last 60 students.
Hence the weight of the 60th student is ( 2640-2619)kg= 21 kg
Hence the weight of the 60th student is 21 kg.
Similar questions