Probability

Probability

By catherine dimaala

What is Probability?

Probability is...

..how likely something is to happen. You might also hear it called chance.

Probability can be expressed as:

fractions, decimals or percentages or on a probability scale.

Probability Scale

• Certain: an event will happen without a doubt

• Likely: the probability of one event is higher than the probability of another event

• Equal probability: the chance of each event happening is the same

• Unlikely: one event is less likely to happen versus another event

• Impossible: there's no chance of an event happening

Probability Scale

Multiple Choice

Probability is a number that describes the...

• relationship between two sets of data.

• distance around a figure.

• likelihood that an event will occur.

Multiple Choice

According to the meteorologist, there is a 80% chance of rain on Monday. This means that the chance of rain is _________.

• Certain

• Unlikely

• Likely

• Impossible

Multiple Choice

A flying pig

• certain

• likely

• unlikely

• Impossible

Multiple Choice

Ben has two marbles of the same size in his pocket, a green one and a red one. He puts his hand into his pocket and, without looking, takes out a red marble.

• impossible

• even chance

• likely

• unlikely

Multiple Choice

Leroy has six red marbles of the same size in his pocket. He puts his hand into his pocket and, without looking, takes out a blue marble.

• Certain

• Likely

• Unlikely

• Impossibble

Probability as Fractions

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