1.

In an examination, 25 students secured the following marks: 23 28 30 32 35 35 36 40 41 43 44 45 45 48 49 52 53 54 56 56 58 61 62 65 68 (i) Arrange these data in the form of a frequency distribution using the following class as intervals:20−29, 30−39, 40−49, 50−59, and 60−69.(ii) Arrange the data with cumulative frequencies.

Answer» In an examination, 25 students secured the following marks:

































23 28 30 32 35 35 36 40 41 43 44 45 45
48 49 52 53 54 56 56 58 61 62 65 68

(i) Arrange these data in the form of a frequency distribution using the following class as intervals:

20−29, 30−39, 40−49, 50−59, and 60−69.

(ii) Arrange the data with cumulative frequencies.


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