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Intro to Counting and Probability
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Probability of A or B

Practice problem

Probability of A or B

By EElise Molinaro

A number from $1$ to $10$ is chosen at random. What is the probability of choosing an odd or prime number?

Choose one answer

Option A: A

$\frac{2}{5}$

Option B: B

$\frac{7}{10}$

Option C: C

$\frac{1}{5}$

Option D: D

$\frac{9}{10}$

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