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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