Probability

A college professor has been studying the relationship between the attendance habits of his students and the grades they earn in his courses. A breakdown of 200 of his students revealed the following:
Attended regularly --- 160
Attended sometimes --- 40
Passed --- 170 and Failed --- 30
140 Passed and 20 Failed
30 Passed and 10 failed
Assume that a student is chosen at random. What is the probability that the student passes the course, given that the student attended class sometimes?

asked by Angela
  1. The probability of both/all events occurring is found by multiplying the individual events.

    40/200 * 30/40 = ?

    posted by PsyDAG

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