7.DS.C.4: Explain that a probability of 0 means the event is impossible, 1 means it is certain, and values closer to 0 or 1 indicate how unlikely or likely the event is. Use this understanding to estimate the probability of chance events based on knowledge about the context, and compare the likelihood of different events.

Explain that a probability of 0 means the event is impossible, 1 means it is certain, and values closer to 0 or 1 indicate how unlikely or likely the event is. Use this understanding to estimate the probability of chance events based on knowledge about the context, and compare the likelihood of different events.

Example Problems

Nina has a

\frac{3}{5}

chance of beating her personal best in a sprint. Moira has a

0.59

chance of doing the same in her own race.

Who is more likely?

Liv and Mae entered a spirit week costume contest. The probability that Liv wins is

0.22

. The probability that Mae wins is

\frac{1}{4}

.

Who is more likely to win?

Jordan played

80

rounds of a Minecraft game and won

24

of them.

Based on this data, what is a reasonable estimate of the probability that Jordan wins his next round?

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