Simple Probability

Front

What is Simple Probability?

Back

Simple probability is the measure of the likelihood that a specific event will occur, expressed as a ratio of favorable outcomes to the total number of possible outcomes.

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What is the formula for calculating probability?

Back

The formula for probability is: P(Event) = Number of favorable outcomes / Total number of possible outcomes.

Front

What is the probability of spinning an even number on a spinner with numbers 1 to 6?

Back

50% (3 even numbers: 2, 4, 6 out of 6 total numbers).

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What is the probability of spinning a red OR a yellow on a spinner with 8 equal sections, 4 red and 4 yellow?

Back

1/2 (4 favorable outcomes: red or yellow out of 8 total sections).

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What is the probability of landing on a number greater than or equal to 4 on a spinner with numbers 1 to 8?

Back

5/8 (5 favorable outcomes: 4, 5, 6, 7, 8 out of 8 total numbers).

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If a box has 3 limes, 5 grapes, and 2 oranges, what is P (NOT lime)?

Back

7/10 (7 non-lime fruits out of 10 total fruits).

Front

What is the probability of spinning green on a spinner with 4 equal sections: red, blue, green, yellow?

Back

1/4 (1 favorable outcome: green out of 4 total sections).

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What does it mean if the probability of an event is 0?

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It means the event is impossible and will not occur.

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What does it mean if the probability of an event is 1?

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It means the event is certain to occur.

Front

How do you express probability as a percentage?

Back

Multiply the probability (as a fraction) by 100.