JEE Main 2021 Mathematics question
If the mean and variance of six observations 7, 10, 11, 15, a, b are 10 and , respectively, then the value of |a – b| is equal to-
Answer: (D)
If the mean and variance of six observations 7, 10, 11, 15, a, b are 10 and , respectively, then the value of |a – b| is equal to-