The following table gives the life - time (in days) of 100 electric bulbs of a certain brand.


Life - time (in days)



Less than 50



Less than 100



Less than 150



Less than 200



Less than 250



Less than 300



Number of bulbs



7



21



52



79



91



100



From this table, construct the frequency distribution table.

The frequency distribution table is:


LIFE TIME (in days)



NUMBER OF BULBS



0 - 50



7



50 - 100



21 - 7 = 14



100 - 150



52 - 21 = 31



150 - 200



79 - 52 = 27



200 - 250



91 - 79 = 12



250 - 300



100 - 91 = 9




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