Probability Practice

A recent survey suggests that 85% of college students have posted a profile on Facebook, 73% use YouTube regularly, and 66% of do both. What is the probability that a randomly selected student uses YouTube regularly given that they have a Facebook profile.

• .776

• .904

• .859

• .824

Tags

CCSS.HSS.CP.B.6

The probability of choosing a king or a black card in a standard deck of cards.

• Mutually Exclusive

• Non Mutually Exclusive

Tags

CCSS.HSS.CP.B.7

If a coin has 0.6 probability coming up tails, the probability that it comes up heads is

• 0.5 
• -0.2 
• 0.4
• 0.6 

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

The probability that a randomly chosen American is a Republican is 0.35. What is the probability that in a sample of 10 Americans, that at least 1 will be a Republican? 

• a) 0.9865
• b) 0.2275
• c) 0.0725
• d) 0.0135

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.6

CCSS.7.SP.C.8

A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced. 
What is P(purple then black)?

• 1/18
• 2/5
• 3/7
• 4/9

Tags

CCSS.HSS.CP.B.6

CCSS.HSS.CP.B.8

CCSS.HSS.CP.A.3

If you are picking a card randomly from a deck of cards, the events of picking a spade and picking a diamond are mutually exclusive.

• True

• False

Tags

CCSS.HSS.CP.A.1

CCSS.HSS.CP.B.7

According to the National Telecommunication and Information Administration, 50.5% of U.S. households had internet access in 2001.  What is the probability that four randomly selected U.S. all had internet access in 2001?

• 6.5%
• 12.6%
• 49.5%
• 50.5%

Tags

CCSS.HSS.CP.B.8

A bicycle shop equips 60% of its bikes with a water bottle holder, and 55% of its bikes are equipped with a kick stand.  34% of the bikes have both features.  What is the probability that a randomly chosen bike has a kick stand GIVEN THAT it has a water bottle holder?

• 34%
• 56.7%
• 61.8%
• 81%

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement.P(both marbles are purple)

• 2/9
• 1/3
• 1/2
• 1/4

Tags

CCSS.HSS.CP.B.8

CCSS.HSS.CP.B.9

A recent survey revealed that 40% of it students use Macs and the rest use PCs. 67% of the students are undergraduates while the rest are grad students. In the survey, 23% of the respondents were grad students who said they use PC as a primary computer. What is the that a randomly selected person is a graduate student given they use a PC.

• .383

• .667

• .825

• .697

Tags

CCSS.HSS.CP.B.6