The monthly profits (in Rs.) of 100 shops are distributed as follows:

Draw the frequency polygon for it.

Find the mean, median and mode of the following data:

Draw an ogive by less than method for the following data:

The following table shows the marks scored by 140 students in an examination of a certain paper:

Calculate the average marks by using all the three methods: direct method, assumed mean deviation and shortcut method.

The following frequency distribution gives the monthly consumption of electricity of the consumers of a locality. Find the median, mean and mode of the data and compare them.