Final answer:
We cannot calculate the probabilities as the necessary information is not provided.
Step-by-step explanation:
The probability of each event A, B, C, and D can be calculated using the information given in the question. Let's calculate each probability step-by-step:
A) To calculate the probability that a randomly selected college senior achieved a high GPA, we need to know the number of college seniors who achieved a high GPA and the total number of college seniors who use the career center. Unfortunately, this information is not given in the question, so we cannot calculate the probability.
B) To calculate the probability that a randomly selected college senior will find a job immediately, we need to know the number of college seniors who found a job immediately and the total number of college seniors who use the career center. Again, this information is not provided, so we cannot calculate the probability.
C) To calculate the probability that a randomly selected college senior has no student loans, we need to know the number of college seniors with no student loans and the total number of college seniors who use the career center. Once again, this information is not given, so we cannot calculate the probability.
D) To calculate the probability that a randomly selected college senior changed majors multiple times, we need to know the number of college seniors who changed majors multiple times and the total number of college seniors who use the career center. Unfortunately, this information is not provided, so we cannot calculate the probability.