7 Views

Question : The average weight of 100 students is 34 kg. The average weight of the first 49 students is 34 kg and of the last 50 students is 32 kg. What is the weight of the 50th student?

Option 1: 138 kg

Option 2: 134 kg

Option 3: 130 kg

Option 4: 136 kg


Team Careers360 10th Jan, 2024
Answer (1)
Team Careers360 20th Jan, 2024

Correct Answer: 134 kg


Solution : The average weight of 100 students = 34 kg
$\therefore$ Total weight of 100 students = 100 × 34 = 3400 kg
The average weight of first 49 students = 34 kg
$\therefore$ Total weight of first 49 students = 34 × 49 = 1666 kg
The average weight of last 50 students = 32 kg
$\therefore$ Total weight of last 50 students = 50 × 32 = 1600 kg
So, the weight of the 50 th student = 3400 - 1666 - 1600 = 134 kg
Hence, the correct answer is 134.

How to crack SSC CHSL

Candidates can download this e-book to give a boost to thier preparation.

Download Now

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books