Probabilities Act 20 to 21-1

What is probability?

• The number of ways an event can happen divided by the total number of outcomes
• The frequency of an event divided by the number of trials
• How likely an event is to occur
• All of the above

Each of the 20 students in Mr. Anderson's class flipped a coin ten times and recorded how many times it came out heads.  Use this data to estimate the probability of observing 4, 5, or 6 heads in ten tosses of the coin.

• 4/20
• 5/20
• 12/20
• 3/20

Tags

CCSS.7.SP.C.6

On this spinner, what is P(A)?

• ³/₈

• ⁴/₈

• ²/₈

• ⁵/₈

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

On this spinner, what is P(not A)?

• ³/₈

• ⁴/₈

• ²/₈

• ⁵/₈

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

If a counter is selected at random from this bag, what is P(not yellow)?

• ²/₃

• ²/₅

• ³/₅

• ¹/₅

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

What probability is the same as impossible?

• 0

• ¹/₂

• 1

• 0.1

Tags

CCSS.7.SP.C.5

What probability is the same as certain?

• 0

• ¹/₂

• 1

• 0.1

Tags

CCSS.7.SP.C.5

What is the complement of flipping a coin 20 times and landing on heads 11 times?

• P' = 1/10

• P' = 11/20

• P' = 9/20

• P' = 10/20

Tags

CCSS.HSS.CP.A.1

What is the complement of choosing a red marble if there are 8 red marbles in a jar of 15?

• P' = 3/15

• P' = 7/15

• P' = 8/15

• P' = 15/8

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

Experimental Probability is:

• What Will happen 
• What actually happens
• What should happen
• What I think Happens

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.6