CCSS.Math.Content.7.SP.C.7

Which of the following expressions can be used to calculate the probability of two related events occurring?

• P(event) x 2
• P(event 1) +   P(event 2)
• P(event 1) x     P(event 2)
• P(event 1 + 2)

Tags

CCSS.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.8

A basket contains 5 purple pencils and 9 brown pencils. If two pencils are picked at random one after the other without replacement, then what is the probability that both the pencils are purple?

• 9/182
• 5/182
• 2/91
• 10/91

Tags

CCSS.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.5

CCSS.Math.Content.7.SP.C.8

A basket contains 5 purple pencils and 9 brown pencils. If two pencils are picked at random one after the other without replacement, then what is the probability that both the pencils are purple?

• 9/182
• 5/182
• 2/91
• 10/91

Tags

CCSS.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.5

CCSS.Math.Content.7.SP.C.8

A chorus has 50 girls and 35 boys. If two are chosen at random to sing a duet, what is the probability that both will be boys? 

• 1/6
• 7/17
• 3/8
• 13/25

Tags

CCSS.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.5

CCSS.Math.Content.7.SP.C.8

A bag contains 2 blue marbles, 3 black marbles, and 5 red marbles. Mrs. Grow picks one marble, replaces it, then picks another. What is the probability of them both being blue?
P(blue and blue) 

• 1/25
• 1/5
• 1/20
• 2/5

Tags

CCSS.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.5

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.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.5

You pick a marble from this bag.
What is the probability you will choose either a black or white marble?

• 3/5
• 9/100
• 1/10
• 2/5

Tags

CCSS.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.5

At a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of 0.6. What percentage of students at the high school have a GPA between 2.3 and 3.5?

• 68%
• 99.7%
• 95%
• 84%

Tags

CCSS.Math.Content.7.SP.C.7

Suppose two tiles are drawn from the collection shown. The first tile is  not replaced before the second tile is drawn. Find P(A and A)

• 4/225
• 1/105
• 3/71

Tags

CCSS.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.5

CCSS.Math.Content.7.SP.C.8

A piggy bank contains 4 quarters, 18 dimes, 10 nickels, and 8 pennies. A coin is chosen at random, not replaced, then another is chosen. Find each probability.

P (both dimes).

• 17/200

• 1/25

• 51/260

• 102/521

Tags

CCSS.Math.Content.7.SP.C.7

CCSS.Math.Content.7.SP.C.5