A teacher has two groups of students A and B. The average marks of group A is…
2026
A teacher has two groups of students A and B. The average marks of group A is 84 and the average marks of group B is 78. If the total number of students in group A is 20 and in group B is 30, find the combined average marks of all students.
- A.
79
- B.
80
- C.
81
- D.
82
Attempted by 54 students.
Show answer & explanation
Correct answer: B
Calculate total marks for Group A: 84 * 20 = 1680.
Calculate total marks for Group B: 78 * 30 = 2340.
Find combined total marks: 1680 + 2340 = 4020.
Total students: 20 + 30 = 50.
Combined average: 4020 / 50 = 80.4. (Rounded to 80 as per options).
Final Answer: Option 2