Mathematics

Problem

The marks (out of 50) obtained by 45 students in a test are grouped as follows: Class interval (marks): 0–9 | 10–19 | 20–29 | 30–39 | 40–49 Frequency: 4 | 9 | p | 11 | 8 The cumulative frequency up to the class 20–29 is 26. Find the value of

p

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