the mean weight of 120 students of a school is 52.75kgs. if the mean weight of 50 of them 51 kgs, find the mean weight of remaining students.
the mean weight of 120 students of a school is 52.75kgs. if the mean weight of 50 of them 51 kgs, find the mean weight of remaining students.
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
total weight of 120 student = 52.75×120=6330
mean of 1st 50 student = 51
total weight of 50 student = 51×50=2550
so weight of last 70 student = 6330-2550=3780
mean weight= 3780/70=54
Dear Student,
◆ Answer -
Mean weight of remaining students = 54 kg
● Explanation -
Total weight of 120 students is -
Weight of 120 students = 120 × 52.75N
Weight of 120 students = 6330 kg
Total weight of 50 students is -
Weight of 120 students = 50 × 51
Weight of 120 students = 2550 kg
Weight of remaining 120-50 = 70 students,
Weight of 70 students = 6330 - 2550
Weight of 70 students = 3780 kg
Mean weight of remaining students is -
Mean weight of remaining students = 3780 / 70
Mean weight of remaining students = 54 kg
Hence, mean weight of remaining students is 54 kg.