Question

A class teacher has the following absentees record of 30 students of a class. Number of days | 0 – 4 | 4 – 8 | 8 – 12 | 12 – 16 | 16 – 20 | 20 – 24 Number of Absent students | 1 | 8 | x | 6 | 5 | y If the mean number of days a student was absent is 12, find the values of x and y.

The following table shows the daily expenditure of 25 households of a locality. | Daily Expenditure (in ₹) | Number of Households | |--------------------------|----------------------| | 500 – 750 | 4 | | 750 – 1000 | 2x + 1 | | 1000 – 1250 | 12 | | 1250 – 1500 | x | | 1500 – 1750 | 2 | Find the value of x. Hence find the mean daily expenditure.

Find 'mean' and 'mode' of the following data :

Find 'mean' and 'mode' of the following data : | Class | 10-25 | 25-40 | 40-55 | 55-70 | 70-85 | 85-100 | |-------|-------|-------|-------|-------|-------|--------| | Number of Students | 12 | 10 | 15 | 13 | 8 | 12 |