convert ther following  data into a simple frequency distribution

5 student obtained less than 3 marks

12 student obtained less than 6 marks

25 student obtained less than 9 marks

33 student obtained less than 12 marks

Class Interval

Frequency

0–3

 5

3–6

        (12–5)= 7 

6–9

(25–12)= 13

9–12

(33–25)= 8

  • 10
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