1. For each of the following determine the probability. A card is drawn from a standard deck of 52 cards. Enter your answers as reduced fractions or exact decimals What is the probability it is: a) a 9 OR a 8? b) a black 5 OR a red 6? c) a 2 OR a black card? d) an even numbered card OR a black card? e) a Heart OR a 2?

2. A bag contains 6 red marbles, 9 white marbles, and 6 blue marbles. You draw 4 marbles out at random, without replacement. What is the probability that all the marbles are red? a) The probability that all the marbles are red is? b) What is the probability that exactly two of the marbles are red? The probability that exactly two of the marbles are red is? c) What is the probability that none of the marbles are red? The probability of picking no red marbles is?

3. On a recent quiz, the class mean was 77 with a standard deviation of 3.

Calculate the z-score (to at least 2 decimal places) for a person who received score of 72. a) z-score: b) Is this unusual?