ICSE Class 9 Maths Grouping and Tabulation of Data
- The mean of 5 observations is 22 and other 4 observations is 17.5. Find the mean of all observations
- age 15-20 , 20-25, 25-30, 30-35,35-40 . no. of teachers 10 , 30 , 50 , 30 , 6 . 1) write the lower limit of the first class intreval can u determine the class limit fourth class intreval determine the class size