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What is the probability of drawing a red card from a standard deck?

This is a basic probability question because you can count favourable outcomes directly and divide by the total equally likely single-card outcomes.

Probability result

50%

Exact fraction: 1/2

Decimal: 0.5

The probability is 1/2, which is 0.5 or 50%.

A standard deck has 26 red cards across hearts and diamonds. That makes the probability 26 out of 52, which reduces to 1 out of 2.

Worked steps

Show your work

  1. Inputs: favorable outcomes = 26, total outcomes = 52.
  2. Formula: P(E) = favorable outcomes / total outcomes.
  3. Substitute: P(E) = 26/52.
  4. Reduce: 26/52 = 1/2.
  5. Result: The probability is 1/2, which is 0.5 or 50%.

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A standard deck has 26 red cards across hearts and diamonds. That makes the probability 26 out of 52, which reduces to 1 out of 2.

Formula

Probability model

P(E) = favorable outcomes / total outcomes

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Probability

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Calculation work