Out of 50 students in a class taking a test, 35 of them passed whereas the other 15 failed. What is the probability that a student selected at random passed the test?

0.15

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0.3

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0.35

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0.7

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Solution

The correct option is D 0.7
Total number of students in a class = 50

Number of students who passed the test = 35

$P (P) = \frac{Number of favourable outcomes}{Total number of possible outcomes}$

where P(P) = Probability that student passed the test

= $\frac{Number of students who passed the test}{Total number of students in a class}$

= $\frac{35}{50} = 0.7$

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Similar questions

Out of 50 students in a class taking a test, 35 of them passed whereas the other 15 failed. What is the probability that a student drawn at random passed the exam?

Out of 50 students in a class taking a test, 35 of them passed whereas the other 15 failed. The probability that a student selected at random passed the exam is 0.8.

Q. In a test, the marks obtained by

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students are:

34, 37, 44, 39, 45, 46, 35, 42, 48, 40, 39, 33, 43, 47, 44.

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Q. 15 out of 20 students in a class have passed in a test. What percentage of students have passed?

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students in a class and their results is below:

Result (Pass/Fail)	Pass	Fail
No. of students	$35$	$15$

If a student chosen at random out of the class (i.e., without any bias), find the probability that the student is not failing (i.e., the student passed the examination).

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