Menu
Popular Courses
Search
Question

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, what is the average marks of all the students?
Options:
A .  53.23
B .  54.68
C .  51.33
D .  50
Answer: Option B

Answer : Option B

Explanation :

Average marks of batch1 = 50
Students in batch1 = 55
$MF#%\text{Total marks of batch1} = 55 \times 50$MF#%
Average marks of batch2 = 55
Students in batch2 = 60
$MF#%\text{Total marks of batch2} = 60\times 55$MF#%
Average marks of batch3 = 60
Students in batch3 = 45
$MF#%\text{Total marks of batch3} = 45 \times 60 $MF#%
Total students = 55 + 60 + 45 = 160
$MF#%\text{Average marks of all the students = }\dfrac{ \left(55 \times 50 \right)+ \left(60 \times 55 \right)+ \left( 45 \times 60 \right)}{160}
\\\\= \dfrac{275+ 330+ 270}{16} = \dfrac{875}{16} = 54.68$MF#%



Was this answer helpful ?
Next Question

Submit Comment/FeedBack

Your email address will not be published. Required fields are marked *

Share this page with your friends!

Latest Videos

Chapter 1 - GLOBAL STEEL SCENARIO & INDI Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Chapter 3.1 : Overview of Finance & Acco Chapter 3 : Finance & Accounts SAIL E0 - GFM 2024
Chapter 2.1 : Overview Chapter 2 : Materials Management SAIL E0 - GFM 2024
Chapter 1.1 : Personnel Functions- An ov Chapter 1 : Personnel Management SAIL E0 - GFM 2024
GPOE / GPA Combined 1 Free CBT Mock Test SAIL E0 2024
CBT Mixed Test 1 GPOE/GPA SAIL E0 2024