JEE Main & Advanced
Mathematics
Statistics
Question Bank
Numerical Value Type Questions - Statistics
question_answer
If mean and standard deviation of 5 observations \[{{x}_{1}},{{x}_{2}},{{x}_{3}},{{x}_{4}},{{x}_{5}}\] are 10 and 3, respectively, then the variance of 6 observations \[{{x}_{1}},{{x}_{2}},.....,{{x}_{5}}\] and \[-50\] is equal to