05/07 Probability: Addition Rules

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

• 11/17

• 13/17

• 10/17

• None of the above

A number from 1 to 10 is chosen at random. What is the probability of choosing a 5 or an even number?

• 3/5

• 1/2

• 1/5

• None of the above

A single 6-sided die is rolled. What is the probability of rolling a 2 or a 5?

• 1/3

• 2/3

• 1/2

• None of the above

A single card is chosen at random from a standard deck of 52 playing cards. What is the probability of choosing a king or a club?

• 1/52

• 16/52

• 17/52

• None of the above

If you draw one card from a standard deck, what is the probability of drawing a 5 or a diamond?

• 2/52

• 4/52

• 4/13

• 26/52

Find the probability of choosing a card at random that is a spade OR a 7

• 1/52

• 1/13

• 4/13

• 17/52

Which of the following shows how to determine P(skateboard or rollerblades)?

• 48/100 + 42/100 - 39/100
• 39/100 + 3/100 - 49/100
• 49/100 + 9/100 - 3/100
• 9/100 + 3/100 - 39/100

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

• 1/7

• 2/14

• 2/7

• None of the above

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

• 11/17

• 13/17

• 10/17

• None of the above

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 the teenager owns a skateboard or a bicycle?

• 1.18

• 0.7

• 0.82

• None of the above