Basics of Probability and Counting

The spinner is spun once. What is the probability the result will be a consonant?

• 6/8

• 2/8

• 4/8

• 7/8

A box contains 6 yellow, 2 black and 4 green pencils.

What is the probability of pulling a SECOND GREEN pencil (if the first one was green and was not put back)?

• 2/11

• 3/12

• 2/12

• 3/11

A box contains 6 yellow, 2 black and 4 green pencils.

What is the probability of pulling a SECOND YELLOW pencil (if the first one was yellow and put back)?

• 6/11

• 5/12

• 6/12

• 5/11

You have 30% chance of pulling a red gummy bear out of a bag.

What is the probability you will not pull a red gummy on your first pull?

• 3/10

• 1/2

• 7/10

• 2/3

What is the probability that the spinner will land on a 5?

• 5/12

• 6/12

• 3/12

• 4/12

A spinner is divided into 52 equal sectors: 8 blue, 24 red and 20 green.

If you throw a dart, what is the probability that the dart hits a sector that is not blue? The answer is simplified

• 7/26

• 6/13

• 5/13

• 11/13

If one card is drawn from a standard deck of 52 playing cards, what is the probability of drawing an ace?

The data in the table represent the number of consumer complaints against major U.S. airlines. If one complaint from the table is randomly selected, find the probability that it was filed against United Airlines.

Airline Number of Complaints

United 1172

Northwest 765

Continental 563

Identify the sample space of the probability experiment: determining the children's gender for a family of three children (Use B for boy and G for girl.) How many are the sample space.

• 9

• 8

• 7

• 6

Determine the number of outcomes in the event. Then decide whether the event is a simple event or not. Explain your reasoning.

You roll a six-sided die. Event B is rolling an even number.

• 1; Simple event because it is an event that consists of a single outcome

• 3; Not a simple event because it is an event that consists of more than a single outcome

• 2; Not a simple event because it is an event that consists of more than a single outcome

• 3; Simple event because the die is only rolled once