Probability (use after 10.4)

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

• 3 out of 50

• 6 out of 100

• 3 out of 100

• 2 out of 20

What is the probability of picking a blue marble, putting it back in the bag, then picking a red marble?

•  $\frac{3}{7}\times\frac{3}{7}$  

•  $\frac{4}{7}\times\frac{4}{7}$  

•  $\frac{4}{7}\times\frac{3}{6}$  

•  $\frac{4}{7}\times\frac{3}{7}$  

Tags

CCSS.7.NS.A.2

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

What is the probability of landing on blue twice in a row?

• $\frac{2}{3}\times\frac{2}{3}$

• $\frac{3}{8}\times\frac{2}{8}$

• $\frac{3}{8}\times\frac{3}{8}$

• $\frac{3}{8}\times\frac{2}{7}$

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

A jar contains 2 green marbles, 4 blue marbles, 3 yellow marbles, and 2 black marbles. A marble is chosen at random from the jar and replaced. Then a second marble is chosen at random. Find the probability of the first marble being green and the second marble being yellow. 

• 4/121
• 8/121
• 3/121
• 6/121

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

How many total outfit options are represented?

• 12
• 22
• 3

Tags

CCSS.K.CC.B.5

P(2 then 5) = 

• 1/6
• 1/12
• 1/36

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Probability can be written as ...

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

Tags

CCSS.7.SP.C.5

You flip a nickel three times.
Find the probability that all flips will land on tails.

• 1/2
• 1/4
• 1/6
• 1/8

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

100 second graders were asked to do a book report about one of these four zoo animals.  The number of students who chose each animal is shown in the table.  If 250 second graders had to choose of of the four animals, predict how many would choose to write about a giraffe.

• 60 students
• 50 students
• 40 students
• 30 students

Tags

CCSS.7.RP.A.2C