For Exercises 17–24, use the given information to do the following for the indicated random variable :
22. The College Board reported for 2014 that, among students who took SAT subject tests, 29,000 students took one SAT subject test, 103,000 took two SAT subject tests, and 90,000 took three. (Hint: Find the sum. Then divide each number of students by the sum to get the probabilities.)