JEE Main 2023 Mathematics question
Let X = {11, 12, 13, ……, 40, 41} and Y = {61, 62, 63, ……, 90, 91} be the two sets of observations. If and are their respective means and is the variance of all the observations in XY, then is equal to .
Answer: 603
Let X = {11, 12, 13, ……, 40, 41} and Y = {61, 62, 63, ……, 90, 91} be the two sets of observations. If and are their respective means and is the variance of all the observations in XY, then is equal to .