Question

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?

• A. 0.15
• B. 0.3
• C. 0.35
• D. 0.7

Answer 1

The correct option is D 0.7

Total number of students in a class = 50

Number of students who passed the test = 35

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

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

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

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