NCERT Exercise 13.2 Q4 - Statistics

Question: For x = 6, 10, 14, 18, 24, 28, 30 with frequencies 2, 4, 7, 12, 8, 4, 3, find mean and variance.

Answer: Use the discrete-frequency formulas for x-bar and sigma^2.

Full step-by-step NCERT solution with diagrams on Something by Zero.