Addition vs Multiplication Rules of Probability

You pick two marbles from the bag. What is the probability you don't pick any blues?

• 56/90
• 64/100
• 4/100
• 2/90

A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced. 
What is P(purple then black)?

• 1/18
• 2/5
• 3/7
• 4/9

Lilly is choosing flowers for her mom, and they are randomly selected. There are 14 roses, 15, sunflowers, and 1 azalea. What is the probability of her getting an azalea, then a rose?

• 7/435
• 1/257
• 5/581
• 2/321

Bag: 20 marbles, 5 blue

We draw the first marble and get a blue. We do not return it to the bag. What is the probability of the second marble being blue?

• 4/19

• 5/20

• 4/20

• 5/19

Tags

CCSS.HSS.CP.B.6

Randy has 4 pennies, 3 nickels, and 3 dimes in his pocket. If he randomly chooses 2 coins without replacement, what is the probability they are both dimes. 

• 1/15
• 2/27
• 3/19
• 4/21

Tags

CCSS.7.EE.B.3

What is the probability of spinning green or blue?

• 0
• 5/12
• 1/2
• 3/4

If you roll one die, what is the probability of getting an even number or a multiple of 3?

• 1/3
• 2/3
• 1/2
• 1/6

A bag contains 9 green marbles, 5 yellow marbles and 6 red marbles.  You choose one marble.   What is the probability of selecting a green or red marble?

• 8/15
• 6/11
• 3/4
• 2/3

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