CUET and UG exam CUET UG 2025 Mock Test Series Engineering Mathematics Probability and Statistics Statistical Variables
For a group of 5 male residents in a society, the mean and standard deviation of their ages are 63 years and 9 years, respectively. For a group of 4 female residents, these values are 54 years and 6 years, respectively. The variance of the combined group of male and female residents is:
1
3
2
81
3
27
4
9