Question
Draw, in the same diagram, a histogram and a frequency polygon to represent the following data which shows the monthly cost of living index of a city in a period of 2 years:
Cost of living inex: 440-460 460-480 480-500 500-520 520-540 540-560 560-580 580-600
No.of months: 2 4 3 5 3 2 1 4

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