Question

For a certain class, the following data table compares how many students passed a test and whether or not they completed the homework due the day of the test. What is the probability that a student chosen randomly from the class failed the test and did not complete the homework?
Passed the test Failed the test
Completed the homework 12 3
Did not complete the homework 2 7

Answer 1

There are 24 students total (12+3+2+7). The number who failed and did not complete the homework is 7, so the probability is 7/24 (≈29.17%).