Making Predictions Using Probability

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1, where 0 means the event will not happen and 1 means it will definitely happen.

Tags

CCSS.7.SP.C.5

Front

What is the probability of rolling a 7 on a standard number cube?

Back

0, because a standard number cube (die) has faces numbered 1 to 6, and 7 is not a possible outcome.

Tags

CCSS.7.SP.C.5

Front

If a spinner has 4 equal sections, what is the probability of landing on any one section?

Back

1/4 or 0.25, since there are 4 equal sections.

Tags

CCSS.7.SP.C.7A

Front

What is the expected number of times a fair coin lands on heads when tossed 120 times?

Back

Approximately 60 times, since the probability of heads is 1/2.

Tags

CCSS.7.SP.C.6

Front

How do you calculate the expected number of outcomes in probability?

Back

Multiply the total number of trials by the probability of the desired outcome.

Tags

CCSS.7.SP.C.6

Front

If a spinner is spun 25 times and has 5 equal sections, how many times should it land on one specific section?

Back

Expected to land on that section 5 times, since 25 * (1/5) = 5.

Tags

CCSS.7.SP.C.6

Front

What does it mean for an event to be 'likely' in probability?

Back

An event is considered 'likely' if its probability is greater than 0.5.

Tags

CCSS.7.SP.C.5

Front

What is the probability of not rolling a 3 on a number cube?

Back

5/6, since there are 5 outcomes that are not 3.

Front

If a box contains 3 red, 2 blue, and 5 green paper clips, what is the probability of selecting a red paper clip?

Back

3/10, since there are 3 red clips out of a total of 10.

Tags

CCSS.7.SP.C.7B

Front

What is the law of large numbers in probability?

Back

The law of large numbers states that as the number of trials increases, the experimental probability will get closer to the theoretical probability.