Probability Math

Looking at the picture, what is the probability that I will pick a green ball out of the bag?

• 4

• 4/10

• 1/2

• 4/6

What words do we use to describe probability? (Choose 3)

• Certain

• Maybe

• Impossible

• Likely

• No chance at all

The word impossible is associated with which percentage?

• 100%

• 5%

• 25%

• 0%

If I flip a coin, the probability of getting either heads or tails is 50%.

True or False.

• True

• False

I have a bag of cookies. 5 of them are chocolate chip and 3 of them are Oreos. What is the probability that I will pick out an Oreo?

• 3/5

• 3/8

• 5

• 3

What is the probability of rolling a 3 on a number cube?

• 3/6
• 1/6
• 1/4

A bag has 10 marbles:  3 blue, 2 yellow, 4 red, and 1 purple.
What is the probability of picking out a purple marble?

• 3/10
• 1/10
• 4/10

A spinner has 8 sections: 2 purple, 2 yellow, 3 blue, and 1 red.
What is the probability of spinning and landing on a color that is not yellow?

• P(not yellow) = 6/8
• P(not yellow) = 2/8
• P(not yellow) = 6

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

The probability of flipping a coin and landing on tails is 1/2.
If you flip the coin 100 times, approximately how many times could you expect to land on tails?

• 50 times
• 100 times
• 200 times