Example 7 - The percentage of marks obtained by a student - Ungrouped frequency

  1. Chapter 15 Class 9 Probability
  2. Serial order wise
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Example 7 The percentage of marks obtained by a student in the monthly unit tests are given below: Based on this data, find the probability that the student gets more than 70% marks in a unit test. Total number of unit tests held = 5 Student obtained more than 70% marks in Unit test II, III & V Number of unit tests in which the student obtained more than 70% marks = 3. So, P(scoring more than 70% marks) = 3﷮5﷯ = 0.6

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.