Probability Review for 7th grade

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement. What is the probability both marbles are purple?

P(both marbles are purple)

• 2/9

• 1/3

• 1/2

• 1/4

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

How many outcomes? You can choose from 3 different meats and 3 different cheeses.

• 9
• 3
• 6
• 24

A spinner has 8 sections: 2 purple, 2 yellow, 3 blue, and 1 red.
What is the probability of spinning and landing on a blue or purple section?

• P(blue or purple) = 2/8
• P(blue or purple) = 3
• P(blue or purple) = 5/8

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

You roll two die.
What is the probability you will roll a 4, then roll a number less than 3?

• 1/36
• 1/18
• 1/9
• 1/6

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

A box contains 3 black pens, 7 blue pens, and 5 red pens. Without looking, Juan randomly picks a red pen out of the box. If he chooses another pen out of the box without replacing the first one, what is the probability that he will pick a red pen both times?

• 2/21
• 1/9
• 5/42
• 9/29

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Dependent or Independent:
You flip a coin and then roll a fair six-sided die.  The coin lands heads-up and the die shows a one.

• Dependent
• Independent

Tags

CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.3

CCSS.HSS.CP.B.6

CCSS.HSS.CP.B.8

Clare picks a marble at random, puts it back, and then picks another marble at random.

• Dependent
• Independent

Tags

CCSS.7.SP.C.5

Christopher picks a marble at random. Without putting the first marble back, he picks a second marble at random.

• Independent 
• Dependent

At summer camp, the campers pick two activities for the first day of camp. They can choose from among hiking, canoeing, rock climbing, and bird watching. How many different combinations of activities are there?

• 6

• 12

• 2

• 8

A restaurant offers four sizes of pizza, two types of crust, and eight toppings. How many possibles combinations of pizza with one topping are there?

• 64
• 14
• 4
• 112