Probability and Statistics homework
Hey guys, I am trying to figure out these two problems, but I cann't really understand what my teacher is asking for. Could someone please help? Its do tomorrow.
1) For events A and B, find the formulas for the probabilities of the following events in terms of quantities P(A), P(B), and P(AnB). (n denotes intersection, and u denotes union)
A) either A or B or both
B) either A or B but not both
C) at least one of A or B
D) At most one of A or B
My answers: (my answers may be so wrong, the teacher didn't even explain this)
2) A) In a draft lottery containing the 366 days of the year (including Feb. 29), what is the probability that the first 180 days drawn(without replacement) are evenly distributed among the 12 months?
B) What is the probability that the first 30 days drawn contain none from September?