Draw the frequency polygon using mid-ponts for the following data… - Vidyadip

Question

Draw the frequency polygon using mid-ponts for the following data on time required to do a certain job.

Time required (in hours)	50-70	70-90	90-110	110-130	130-150	150-170	170-190
No. of workers	2	8	30	25	14	19	2

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