Probability

What is probability?

• directly measures the likelihood of an event happening.

• is a ratio of two probabilities: the probability of an event happening in one group, P(E) divided by the probability of an event happening in another group, P(C).

• measures the likelihood of an event happening against the likelihood of the event not happening.

Tags

CCSS.7.SP.C.5

What are the odds of rolling a "4" in a standard 6 sided die?

Tags

CCSS.7.SP.C.7A

Annie and Jax play spin the wheel. The wheel contains 8 equal segments- 3 pink, 1 blue, 1 yellow, 2 red, and 1 orange. What is the probability of Jax spinning and landing on red? Draw the wheel and show your work.

Tags

CCSS.7.SP.C.7B

Friskies co. is testing a newly formulated cat treat. A group of cats, all indoor cats, take part in the product testing. Some eat the new cat treats, while others eat the old formula treats. During the product testing, the owners of some cats say their cat has vomited. The data is shown in the contingency table below. What is the risk of vomiting for cats who ate the newly formulated cat treats?  

Tags

CCSS.8.SP.A.4

Using ratios, what is the odds for flipping a coin and landing on tails?

What are odds?

• is a ratio of two probabilities: the probability of an event happening in one group, P(E) divided by the probability of an event happening in another group, P(C).

• measures the likelihood of an event happening against the likelihood of the event not happening.

• directly measures the likelihood of an event happening.

Question

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In the daily weather forecast, the meteorologist says there is a 75% chance that it will not rain. If someone wants to know the odds that it will rain, how do they do this and what are the odds?

What is risk?

• is a ratio of two probabilities: the probability of an event happening in one group, P(E) divided by the probability of an event happening in another group, P(C).

• directly measures the likelihood of an event happening.

• measures the likelihood of an event happening against the likelihood of the event not happening.

Tags

CCSS.HSS.MD.B.5B

What are the odds for AND against pulling a 5 in a standard deck of cards? Show your work.

How strongly do you feel about probability, risk, and finding the odds using probability?

• Great!!!

• I could use more practice and reviews

• I don't get it at all!