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Question
The percentages of marks obtained by a student in six unit tests are given below:
| Unit test | 1 | 2 | 3 | 4 | 5 | 6 |
| Percentage of marks obtained |
53 | 72 | 95 | 46 | 67 | 59 |
A unit test is selected at random. What is the probability that the student gets more than 60% marks in the test?
Solution
Total number of tests = 6
Let E be the event in which the chosen student receives more than 60%.
Number of times event E occurs = 3
As a result, P (Student receives more than 60% on test)
P(E) = `"Number of test in which student get more than 60% marks"/"Total number of tests"`
= `3/6`
= `1/2`
As a result, the needed probability is `1/2`.
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