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he marks obtained by the student in a test of 20 marks in Mathematics are as follows. Find the median of the information. Marks 4 6 10 15 18 20 Number of students 2 4 8 12 3 1 |
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Answer» Answer: In a class TEST, 50 students obtained marks as follows- Marks obtained 0-20 20-40 40-60 60-80 80-100 No. of students 4 6 25 10 5 Find the modal class and the median class. Easy share Share Answer Marksobtained No.ofstudents (F) Cumulativefrequency 0−20 4 4 20−40 6 10 40−60 25 35 60−80 10 45 80−100 5 50 ⇒ Here, N=50, then 2 N
= 2 50
=25 We can see, 25 is NEAREST to CUMULATIVE frequency 35 which has class interval 40−60 ∴ Median class =40−60. ⇒ In frequency table we can see class 40−60 has highest frequency 25. ∴ Modal class =40−60 |
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