Contingency Table 1A summarizes two categorical variables: status of completion of

course and the website from which the courses has been taken by students. Given

that there are 1, 270 students who have enrolled in various courses on three different

platforms.

Website A Website B Website C

Completed: 120 350 200

Not completed: 200 100 300

Table 7.1.A

(a) What is the probability that a student chosen at random will be completing the course?

(b) Calculate P(student completing the course | student has taken a course from web-

site A).