Forty candidates from 10th class of a school appear for a test. The number of questions (out of 60) attempted by them in forty five minutes is given here.
52,42,40,36,12,28,15,37,35,22,39,50,54,39,21,34,46,31,10,09,
13,24,29,31,49,58,40,44,37,28,13,16,29,36,39,41,47,55,52,09.
Prepare a frequency distribution table with the class size 10 and answer the following:
(i) Which class has the highest frequency?
(ii) Which class has the lowest frequency?
(iii) Write the upper and lower limits of the class (20−29).
(iv) Which two classes have the same frequency?