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Find frequency curve {{10-20,20-30,30-40,40-50,50-60},{15,25,20,12,8}}

Solution:
Your problem -> frequency curve {{10-20,20-30,30-40,40-50,50-60},{15,25,20,12,8}}

To draw Frequency Polygon, we first prepare the following table

 Class Mid Frequencyf 0 - 10 5 0 10 - 20 15 15 20 - 30 25 25 30 - 40 35 20 40 - 50 45 12 50 - 60 55 8 60 - 70 65 0

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