The electricity bills (in rupees) of 25 houses of a certain locality for a month are given below:

324, 700, 617, 400, 356, 365, 435, 506, 548, 736, 780, 378, 570, 685, 312, 630, 584, 674, 754, 776, 596, 745, 565, 763, 472.


Arrange the above data in increasing order and form a frequency table using equal class intervals, starting from 300-400, where 400 is not included.

The frequency distribution table is given as:


Electricity Bills



Tally Marks



Number of Houses (Frequency)



300 – 400





5



400 – 500



III



3



500 – 600





6



600 – 700



IIII



4



700 – 800





7




Total



25




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