Mathematics
Given below are the marks secured by 35 students in a test:
41, 32, 35, 21, 11, 47, 42, 00, 05, 18, 25, 24, 29, 38, 30, 04, 14, 24, 34, 44, 48, 33, 36, 38, 41, 46, 08, 34, 39, 11, 13, 27, 26, 43, 03.
Taking class intervals 0 - 10, 10 - 20, 20 - 30 …., construct frequency as well as cumulative frequency distribution table. Find the number of students obtaining below 20 marks.
Statistics
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Answer
The cumulative frequency distribution table is given below:
| Classes | Frequency | Cumulative frequency |
|---|---|---|
| 0 - 10 | 5 | 5 |
| 10 - 20 | 5 | 10 (5 + 5) |
| 20 - 30 | 7 | 17 (7 + 10) |
| 30 - 40 | 10 | 27 (10 + 17) |
| 40 - 50 | 8 | 35 (8 + 27) |
From table,
The no. of students obtaining below 20 marks = 10.
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(ii) Which class has the largest frequency?
(iii) How many students score less than 40 marks?
(iv) How many students score first division (60% or more) marks?
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