tsanbeck5152 tsanbeck5152 02-01-2024 Mathematics contestada The class marks of a frequency distribution are given as follow 15,20,25,...The class corresponding to the class mark 20 isa. 12.5 – 17.5b. 17.5 – 22.5c. 18.5 – 21.5d. 19.5 – 20.5