ArithmeticQuestion 349 of 550

Class A has 20 students with a mean of 70. Class B has 30 students with a mean of 80. What is the mean of both classes together?

  1. 75
  2. 76
  3. 74
  4. 78
Show answer

Correct answer: 76

Total = 20 × 70 + 30 × 80 = 1400 + 2400 = 3800. Mean = 3800 ÷ 50 = 76.

Test structure: ETEC guide to the GAT

Practice arithmetic

Questions last reviewed: 21 October 2026