Probability

A box contains 3 red marbles, 6 blue marbles and 1 white marble. The marbles are selected 1 at a time and not replaced. Find P(blue and red)

• 9/50
• 1/5
• 6/10
• 18/50

Randy has 4 pennies, 3 nickels, and 3 dimes in his pocket. If he randomly chooses 2 coins without replacement, what is the probability they are both dimes. 

• 1/15
• 2/27
• 3/19
• 4/21

There are 10 pens and 15 pencils in a box. If a student selects two of them at random without replacement, what is the probability of selecting a pen and then a pencil?

• 7/12
• 1/2
• 1/4
• 11/12

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Find the probability of selecting a black checker from a bag of 6 black and 4 red checkers, replacing it and selecting another black. 

• 9/25
• 1/4
• 2/23
• 3/41

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

On Ricky’s shelf are:
·  6 mystery books
·  5 science books
·  4 history books
·  3 adventure books
Ricky will randomly choose 1 book to read.  What is the probability that he will choose a mystery book?

• 1/3
• 1/18
• 6/12
• 1/6

Graysen has a green number cube and a white number cube.  The faces of the cubes are numbered 1 through 6.  Graysen will roll each cube one time.  What is the probability that the green cube will land with an even number face and the white cube will land with a number greater than 2 face up?

• 1/9
• 1/36
• 1/3
• 1/6

Tags

CCSS.HSS.CP.B.7

 Jackie is picking out a new skateboard. The board can be dark brown or gray, and the wheels can be orange, green, pink, or yellow. The decal on the skateboard can be a tiger, a diamond, a bear, or an eagle. How many different combinations does Jackie have to choose from?

• 3 combinations
• 8 combinations 
• 16 combinations
• 32 combinations

A girls' choir is choosing a uniform for their concert. They can pick red, green, or purple sweaters, and they can pick tan, white, or black skirts. The shoes they need come in gold and black. Assuming all the colors go together, how many different combinations can the choir pick?

• 3 combinations
• 8 combinations
• 12 combinations
• 18 combinations

How many outfits are possible with 5 pairs of jeans, 8 t-shirts, and 2 pairs of shoes?

• 15
• 40
• 80
• 10

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10
• 3/9
• 1/9
• 1/3

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7