A class of 25 students took an English test. 15 students had an average score of 80. The other students had an average score of 60. What is the average score of the whole class?

Question

A company has 40 employees whose names are listed in a certain order. In the year 2022, the average bonus of the first 30 employees was Rs. 40000, of the last 30 employees was Rs. 60000, and of the first 10 and last 10 employees together was Rs. 50000. Next year, the average bonus of the first 10 employees increased by 100%, of the last 10 employees increased by 200% and of the remaining employees was unchanged. Then, the average bonus, in rupees, of all the 40 employees together in the year 2023 was

Answer 1

Group 1 (15 students) earned a total score of: \[ \text{Group 1 (15 students)}: 15 \times 80 = 1200 \] Group 2 (10 students) earned a total score of: \[ \text{Group 2 (10 students)}: 10 \times 60 = 600 \] The combined total score for all students is: \[ 1200 + 600 = 1800 \] The total student count is 25. The class's overall average score is calculated as: \[ \frac{1800}{25} = 72. \] This weighted average accurately represents the impact of each group's performance on the total average.

A class of 25 students took an English test. 15 students had an average score of 80. The other students had an average score of 60. What is the average score of the whole class?

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The Correct Option is B

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