Read this assignment carefully. It’s easy to miss some of the questions.
For example, c. asks what the probability of another student whose file we pull has mental health issues. Then it asks for the probability that the student has learning/school issues OR relationship issues. Your lecture notes explain very clearly how to calculate the probability of one event OR another occurring (p(A) or p(B)). The question does not ask you to give the probability of learning/school issues and then give the probability of relationship issues. Lastly it asks for the probability that the student fits in any category except other? Do not give the probability of the file belonging to the ‘other’ category.
It is helpful to include the calculations (and/or formula) for your answers.
Finally, make sure you state why you think convenience sampling will or will not produce the same results as random sampling.
Remember that grammar is important. Take some time because you are still getting used to the terminology and carelessness leads to inaccuracy.
This is helpful in understanding how random and convenience sampling differ.
Difference between Simple Random Sampling and Convenience Sampling