Question

Question

Of the last three chapter tests given in a computer programming class, 11 students passed all three tests, 9 students
passed two tests, and 2 students passed one test. If a single student is picked at random, what is the probability that the
student passed two or three tests?
• Provide the final answer as a simplified fraction.
Provide your answer below:

Answer 1

10/11

Explanation:

There are a total of 22 students who took at least one of the last three chapter tests:

11 students passed all three tests

9 students passed two tests

2 students passed one test

So, the total number of students who passed either two or three tests is:

11 + 9 = 20

Therefore, the probability that a randomly selected student passed two or three tests is:

20/22 = 10/11

Hence, the final answer as a simplified fraction is 10/11.