The following table shows the cumulative frequency distribution of marks of 800 students in an examination:
Marks Number of students
Below 10 10
Below 20 50
Below 30 130
Below 40 270
Below 50 440
Below 60 570
Below 70 670
Below 80 740
Below 90 780
Below 100 800
Construct a frequency distribution table for the data above.
The following is the distribution of weights (in kg) of 40 persons :
Construct a cumulative frequency distribution (of the less than type) table for the data above.
The mileage (km per litre) of 50 cars of the same model was tested by a manufacturer and details are tabulated as given below :
Find the mean mileage.
The manufacturer claimed that the mileage of the model was 16 km/litre. Do you agree with this claim?
The weights (in kg) of 50 wrestlers are recorded in the following table :
Find the mean weight of the wrestlers.
An aircraft has 120 passenger seats. The number of seats occupied during 100 flights is given in the following table :
Determine the mean number of seats occupied over the flights.
The daily income of a sample of 50 employees are tabulated as follows :
Find the mean daily income of employees.
The following table gives the number of pages written by Sarika for completing her own book for 30 days :
Find the mean number of pages written per day.
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