math 157

Consider the experiment involving rolling a single die once.

What is P(even and Prime)?
I do not know how to start this can anyone help?

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1. Which possibilities are both even and prime? Divide that by 6, the number of possibilities for a standard die.

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posted by Marth
2. Would they both be 1/2?

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posted by Rmz
3. P(even and prime) means the probability of rolling a single number that is BOTH even and prime. You found P(even) and P(prime) separately.

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posted by Marth
4. so, because there are the same amount of even and odds wouldnt that make it a 1?

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posted by Rmz
5. The only number that is both even and prime is 2. That is 1 possibility out of 6.

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posted by Marth
6. Oh.... I understand and see that now.

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posted by Rmz

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