Business

#The Complement of an Event

1 A student is chosen at random from a class of 16 girls and 14 boys. What is the probability that the student chosen is not a girl?

2 A glass jar contains 5 red, 3 blue and 2 green jelly beans. If a jelly bean is chosen at random from the

jar, what is the probability that it is not blue?

3 A number between 1 and 5 is chosen at random. What is the probability that the number chosen is not odd?

4 If a number is chosen at random from the following list, what is the probability that it is not prime?

2, 3, 5, 7, 11, 13, 17, 19

5 If a single 6-sided die is rolled, what is the probability of rolling a number that is not 8?

#Addition Rules for Probability

1 A day of the week is chosen at random. What is the probability of choosing a Monday or Tuesday?

2 In a pet store, there are 6 puppies, 9 kittens, 4 gerbils, and 7 parakeets. If a pet is chosen at random, what is the probability of getting a puppy or a parakeet?

3 The probability of a New York teenager owning a skateboard is 0.37,of owning a bicycle is 0.81, and of owning both is 0.36. If a New York teenager is chosen at random, what is the probability that he/she owns

a skateboard or a bicycle?

4 A number between 1 and 10 is chosen at random. What is the probability of getting a 5 or an even number?

5 A single 6-sided die is rolled. What is the probability of getting a number greater than 3 or an even number?

#Probability of Independent Events

1 Spin a spinner numbered 1 to 7, and toss a coin. What is the probability of getting an odd number on the spinner and tail on the coin?

2 A jar contains 6 red balls, 3 green balls, 5 white balls, and 7 yellow balls. Two balls are chosen from the jar, with replacement. What is the probability that both balls are green?

3 In Exercise 2, what is the probability of getting a red and a yellow ball?

4 Four cards are chosen from a...