Study the given table and answer the question that follows.
The table shows the total number of batteries sold by a company (in lakhs) over the years.
A class of 68 students made a mean score of 60 marks, and another class of 32 students made it exactly 52.5. What is the overall mean score?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 57.6.
First class: Total marks = 68 × 60 = 4080
Second class: Total marks = 32 × 52.5 = 1680
Total students = 68 + 32 = 100
Total marks = 4080 + 1680 = 5760
Mean = 5760/100 = 57.6