Probability Pre-Algebra

Probability is ...

• the chance that some event will occur.

• a game that involves coins.

• a guarantee.

Probability can be written as ...

• a fraction

• a decimal

• a percent

• all of the above

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

• 5/11

• 5/6

• 1/3

• 5

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

• 30%

• 70%

• 100%

• 0%

What is the probability of spinning this wheel twice and landing on the green section both times?

A certain event is an event...

• that has a probability of 1

• that is equally likely to occur

• that shows all results

• that almost always happens

A box contains 3 red balls and 2 blue balls. If two balls are drawn at random, what is the probability that both are red?

If the odds of winning a game are 1:4, what is the probability of winning?

A fair die is rolled. What is the probability of rolling a number greater than 4?

If a jar contains 10 white, 5 red, and 15 blue marbles, what is the probability of drawing a red marble?