Simple Probability

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What is Simple Probability?

Back

Simple Probability is the measure of the likelihood that a specific event will occur, expressed as a fraction or ratio.

Tags

CCSS.7.SP.C.7A

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How is probability calculated?

Back

Probability is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

Tags

CCSS.7.SP.C.7A

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What does 'favorable outcomes' mean?

Back

Favorable outcomes are the specific results that we are interested in when calculating probability.

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What is the probability of rolling a 3 on a standard die?

Back

1 out of 6, since there is one favorable outcome (rolling a 3) out of six possible outcomes.

Tags

CCSS.7.SP.C.7A

Front

What is the probability of drawing a heart from a standard deck of cards?

Back

1 out of 4, since there are 13 hearts in a deck of 52 cards.

Tags

CCSS.7.SP.C.7B

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What does 'certain' mean in probability?

Back

Certain means that an event will definitely happen, with a probability of 1.

Tags

CCSS.7.SP.C.5

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What does 'impossible' mean in probability?

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Impossible means that an event cannot happen, with a probability of 0.

Tags

CCSS.7.SP.C.5

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What is the probability of flipping heads on a coin?

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1 out of 2, since there are two possible outcomes (heads or tails) and one favorable outcome (heads).

Tags

CCSS.7.SP.C.7A

Front

If there are 3 red marbles and 2 blue marbles, what is the probability of choosing a red marble?

Back

3 out of 5, since there are 3 favorable outcomes (red marbles) out of 5 total marbles.

Tags

CCSS.7.SP.C.7B

Front

What is the probability of choosing a green marble if there are 4 green, 3 red, and 5 blue marbles?

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4 out of 12, since there are 4 favorable outcomes (green marbles) out of 12 total marbles.

Tags

CCSS.7.SP.C.7B