The electricity bills (in rupees) of 25 houses of a cetrain 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.

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Solution

Arranging the given data in increasing order :

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

Now frequency distribution table is given below :

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The water bills (in rupees) of 32 houses in a certain street for the period 01/01/98 to 31/03/98 given below:
56, 43, 32, 38, 56, 24, 68, 85, 52, 47,

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55, 30, 54, 45, 67, 95, 72, 43, 65, 35, 59.

Tabulate the data and present the data as a cumulative frequency table using 70-79 as one of the class intervals.

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