Introduction to Probability

The likelihood of an event happening is _________.

• percentage

• probability

• parallel

• predictions

An event has a 50% chance of happening. This event is ___.

• Impossible

• Unlikely

• As likely as not

• Likely

• Certain

An event has a 0% chance of happening. This event is ___.

• Impossible

• Unlikely

• As likely as not

• Likely

• Certain

An event has a 75% chance of happening. This event is ___.

• Impossible

• Unlikely

• As likely as not

• Likely

• Certain

An event has a 100% chance of happening. This event is ___.

• Impossible

• Unlikely

• As likely as not

• Likely

• Certain

When figuring the probability of an event, what number goes on top of your fraction?

• The number of the desired event

• The total number of choices

• The event that happens the most

• The even that happens the least

When figuring the probability of an event, what number goes on the bottom of your fraction?

• The number of the desired event

• The total number of choices

• The event that happens the most

• The even that happens the least

A coin has two sides (heads, tails). If you flip the coin, what is the probability you land on tails?

• 1/4

• 1/3

• 1/2

• 2/1

A spinner has 4 sections: 1 red, 1 blue, 1 green, 1 yellow. What is the probability that you spin and land on blue?

• 1/2

• 1/4

• 2/4

• 3/4

A bag has 10 marbles: 4 red, 2 green, 2 blue, 2 yellow. If you reach in the bag and pull out one marble, what is the probability it will be a blue marble?

• 4/10 or 2/5

• 2/10 or 1/5

• 10/10 or 1

• 0/10 or 0