Average: Combined Average

Group 1: 30 students, average 40. Group 2: 20 students, average 55. Combined average is:

Section A: 25 students, average 60. Section B: 35 students, average 70. Combined average is:

Three groups: 10 avg 20, 15 avg 30, 25 avg 40. Combined average is:

Class X: 40 students, average 72. Class Y: 60 students, average 78. Combined average is:

Boys: 20, average height 160 cm. Girls: 30, average 165 cm. Combined average height is:

Two equal groups have averages 50 and 60. Combined average is:

Dept A: 15 employees, avg salary Rs. 48,000. Dept B: 25 employees, avg Rs. 52,000. Combined average salary is:

Team P: 12 members, average 35. Team Q: 18 members, average 45. Combined average is:

Batch 1: 50 students, average 65. Batch 2: 50 students, average 75. Combined average is:

Factory A: 8 workers, avg output 120. Factory B: 12 workers, avg 150. Combined average output is:

In a company, 100 employees avg Rs. 30,000 and 200 employees avg Rs. 36,000. Overall average salary is:

Group of 10 avg 25 and group of 40 avg 40. Combined average is:

Two classes: 30 avg 55, 50 avg 65. Combined average is:

If n₁ = n₂, combined average of A₁ and A₂ equals: