Probability

How do you find compound probability?

• Multiply your probabilities
• Add your probabilities
• Divide your probabilities
• Subtract your probabilities

Tags

CCSS.7.SP.C.8

What is the probability of choosing a red marble?

• 9 out of 20

• 5 out of 20

• impossible

Tags

CCSS.7.SP.C.7B

What is the probability of choosing a red marble, replacing it, and then choosing a blue marble? simplify your answer (solve using a dry erase or paper)

*hint: "and" means to multiply*

• 3 out of 50

• 6 out of 100

• 3 out of 100

• 2 out of 20

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.8

What is the probability of choosing a red marble, keeping it, and then choosing a blue marble. (simplify your answer)

*hint: keeping it means you don't put it back*

• 3 out of 45

• 6 out of 90

• 1 out of 15

• not here

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Is the probability of flipping the coin and rolling the die independent or dependent?

• dependent, rolling a number on the die depends on the result from flipping the coin

• independent, rolling a number on the die does not depend on the result from flipping the coin

• neither

Tags

CCSS.HSS.CP.A.5

What is the probability of choosing a blue marble twice in a row, without replacing the first one.

• 2 out of 90

• 1 out of 45

• 2 out of 8

• 1 out of 4

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

There are 2 violet balls and 4 pink balls in a bag. If two balls are drawn one after the other, then what is the probability of getting violet first and pink next, if the first ball drawn is replaced?

• 1/3
• 2/9
• 1/6
• 1/4

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

You roll a six sided die. What is the probability of rolling an even number three times in a row? 

• 3/100
• 1/2
• 1/6
• 1/8

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Bag A contains 9 red marbles and 3 green marbles. Bag B contains 9 black marbles and 6 orange marbles. Find the probability of selecting one green marble from bag A and one black marble from bag B.

• 3/20
• 1/4
• 3/31
• 2/27

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Cesar's piggy bank has 8 quarters, 2 dimes, 4 nickels, and 6 pennies. He chooses a coin, does not replace it, then chooses another. What is the probability that he chose a dime then a nickel? 

• 1/50
• 2/95
• 1/10
• 4/19

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8