The given raw data can be arranged in an ascending order. The class intervals are 30−39, 40 −49,...100 − 09. Then, take the raw data and place it in the appropriate class intervals.(i) The marks can be arranged in an ascending order as shown below:30 to 39→37, 39
40 to 49→44, 48, 4850 to 59→ 50, 52, 53,55, 56, 58, 58, 59
60 to 69→ 60, 60, 60, 61, 62, 64, 67, 6870 to 79→70, 75, 77, 7880 to 89→ 84, 8890 to 99→90, 98100 to 109→100
(ii) The highest score is 100.(iii) The lowest score is 37.(iv) The range is 100 − 37, i.e. 63.(v) If 40 is the passing mark, then the number of students who failed is 2 (i.e. 37, 39).(vi) The number of students scoring 75 and above is 8 (i.e. 75, 77, 78, 84, 88, 90, 98, 100).(vii) The marks 51, 54, and 57 do not actually appear between 50 and 60.(viii) The number of students scoring less than 50 is 5 (i.e. 37, 39, 44, 48, 48).