27, 57, 57, 40, 70, 48, 59, 60, 42, 44, 47, 44, 44, 59, 35, 48, 43, 52, 36, 48

(a) Group the marks in class intervals 20 – 29, 30 – 39, etc. and then construct the frequency distribution table.

(b) Draw the histogram for the distribution