Help

D Question 12 Refer to the following distribution of commissions: Monthly Commissions Class Frequencies $60 up to $80 3 $80 up to $100 $100 up to $120 11 $120 up to $140 22 $140 up to $160 40 $160 up to $180 24 $180 up to $200 9 $200 up to $220 4 What is the class interval? 40 20 200 O 21 Previous