Question

Q1: The CAT scores of 60 students are summarized below:
Class
40-50 50-60 60-70
70-80 80-90 90-100
Frequency
10
12
15
10
Calculate the sample mean, the sample variance and the standard deviation for the grouped data.
8
5​

Answer 1

10 12 15 it's correct plzz tell me any one