4.1-4.4 probability review

Probability is ...

• the chance that some event will occur.
• a game that involves coins.
• a guarantee.

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

Probability can be written as ...

• a fraction
• a decimal
• a percent
• all of the above

Tags

CCSS.7.SP.C.5

The probability of Asher's soccer team winning its next game is 7/10.  What is the probability of not winning their next game?

• unlikely
• 3/10
• 1/2
• impossible

Tags

CCSS.7.SP.C.5

What are mutually exclusive events?

• Events that can happen at the same time

• Events that cannot happen at the same time

• Events that add up to 100%

Tags

CCSS.HSS.CP.B.7

Rolling a 6 or an even number

• Mutually exclusive

• Not mutually exclusive

Tags

CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.4

Rolling a six and rolling an odd number

• Mutually exclusive

• Not mutually exclusive

Tags

CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.4

Which of the following shows how to determine P(shaded number or number less than five)?

• 4/8 + 4/8 - 2/8
• 4/9 + 2/8 - 4/8
• 4/8 + 6/8 + 2/8
• 2/8 + 4/8 - 4/8

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

A stack of magazines has 5 news magazines and 10 sports magazines. Two magazines are drawn at random without replacement. What is the probability of selecting a news magazine first and then a sports magazine?

• $\frac{1}{5}$

• $\frac{3}{14}$

• $\frac{2}{9}$

• $\frac{5}{21}$

Tags

CCSS.HSS.CP.B.8

CCSS.HSS.CP.B.9

A box of stickers contains 25 gold stars, 75 red stars, and 50 blue stars, all of the same size. In two random selections, what is the probability of selecting a blue star, replacing it, and then selecting a blue star again?

• $\frac{1}{9}$

• $\frac{1}{6}$

• $\frac{1}{4}$

• $\frac{2}{3}$

Tags

CCSS.HSS.CP.A.1

CCSS.HSS.CP.A.2

CCSS.HSS.CP.B.8

find the probability of choosing a student at random that plays an instrument OR a sport

• 1/2

• 13/20

• 21/20

• 4/5