00:01
This problem says a survey of 100 high school students provided this frequency table on how students get to school.
00:07
And we're given grades of sophomore, junior, and senior, and the methods of driving to school, or getting to school, as driving to school, taking the bus, or walking.
00:14
And we are asked to find the probability that a randomly selected student either takes the bus or walks.
00:20
And to figure that out, we're going to look at the probability of our students taking the bus, and then the students walking, and add them together since we have an or probability for one single, a single randomly selected student.
00:33
And to find the probability of our students taking the bus, we'll add our bus column, which is 25 plus 20 plus 5, or 50...