The average score of 5 batches of 20, 25, 30, 15 and 35 students respectively is 40, 35, 30, 40 and 35. Find the average score of all the students put together.
Solution
Correct Answer: Option D
Average marks of 5 batches of 20, 25, 30, 15 & 35 students are 40, 35, 30, 40 & 35.
Therefore, the average Score for all the students is:
\(= \frac{{\left[ {\left( {20 \times 40} \right) + \left( {25 \times 35} \right) + \left( {30 \times 30} \right) + \left( {15 \times 40} \right) + \left( {35 \times 35} \right)} \right]}}{{\left( {20 + 25 + 30 + 15 + 35} \right)}} = \frac{{4400}}{{125}}\)
= 35.20
Hence, the average score of all the students put together is 35.20.
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions