# Probability - birthday

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What is the probability that at least 2 of the 435 members of the House of Representatives have the same birthday?

Â© BrainMass Inc. brainmass.com March 4, 2021, 5:36 pm ad1c9bdddfhttps://brainmass.com/math/probability/probability-birthday-2438

#### Solution Preview

The probability is 1. The answer lies in the pigeonhole theorem.

Even with a leap year, you have more "pigeons" (members) than "holes" ...

#### Solution Summary

This shows how to use the pigeonhole theorem of probability.

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