Please help solve this

Name: Ch 1 Probability - 1.5 MDM 4U1 C: Dependent Events 1. A bag contains numbers from 1 to 20. If two numbers are drawn from the bag, what is the probability of drawing: a. A '3' followed by a '5' (if the first number is put back before the second one is drawn? b. A '3' followed by a '5' (If the first number is NOT put back before the second one is drawn) This idea of something 'being put back, so it can be drawn again' is called replacement. In #1a, the '3' is replaced. In # 1b, the '3' is not replaced. c. How does having replacement, or NOT having replacement, affect the probabilities in this example? You may have noticed that in some instances, the first event can affect the probability of the second event. We call these dependent events. 2. The probability that Patricia will go to York University is 1/5. If Patricia goes to York, the probability that her boyfriend Jerry also goes to York is 3/4. What is the probability that both Patricia AND Jerry attend York U