Question

In a frequency distribution, the mid value of a class is 10 and the width of the class is 6. The lower limit of the class is

The class marks of the median class of the following data is

The following table shows the age of patients admitted in a hospital during a particular week : | Age (in years) | 5 – 15 | 15 – 25 | 25 – 35 | 35 – 45 | 45 – 55 | 55 – 65 | |----------------|--------|---------|---------|---------|---------|----------| | Number of Patients | 5 | 12 | 20 | 24 | 15 | 4 | Find the mean age of the patients.

The mileage (km/l) of 50 cars was recorded by a dealer and tabulated as given below : | Mileage (in km/l) | Number of Cars | |-------------------|----------------| | 10 – 12 | 13 | | 12 – 14 | 18 | | 14 – 16 | 10 | | 16 – 18 | 7 | | 18 – 20 | 2 | Find mean of the above distribution.