Dependent Compound Events (or)

A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or black pen?

In your opinion, what is the best first step?

• Set up the probability for each event

• Draw a visual

• Determine the total number of pens in the box

Tags

CCSS.HSS.CP.B.7

A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or blue pen?

Select all the correct statements about this problem?

• The total will not be affected for the second probability.

• The total will change based off what happens in the first event.

• The total number of pens is 8

• The total number of pens is 15

• The number of blue pens is not needed for this problem

Tags

CCSS.HSS.CP.B.7

A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or blue pen?

What is the probability of pulling a red pen first?

A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or blue pen?

What is the probability of pulling a blue pen if the red pen was not replaced?

A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or blue pen?

• 1/3

• 1/2

• 1/5

• 5/6

There are 2 violet, 3 green, and 4 pink ornaments in a bag. If two ornaments are drawn without replacement, what is the probability of getting a violet or pink?

• 8/9

• 13/18

• 1/3

• 6/17

The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter A or a consonant without replacing the first letter?

• 20/21

• 6/7

• 6/15

• 11/14

Tags

CCSS.HSS.CP.B.7

3 Cokes, 1 Sprite and 1 Dr.Pepper are left in the fridge. What is the probability of selecting a coke or a sprite without replacing the coke?

• 4/9

• 9/20

• 17/20

• 2/5