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 fraction or ratio.

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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.

Front

What does 'favorable outcomes' mean?

Back

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

Front

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.

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.

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What does 'certain' mean in probability?

Back

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

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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.

Front

What is the probability of flipping heads on a coin?

Back

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

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.

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.