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anonymous

  • one year ago

You have a standard number cube. What is the probability of rolling a number less than 3, and then rolling a prime number?

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  1. kropot72
    • one year ago
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    How many numbers less than 3 are on the cube?

  2. anonymous
    • one year ago
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    2

  3. kropot72
    • one year ago
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    Yes, there are 2 numbers less than 3 on the cube. So the probability of rolling one of those numbers is 2/6. How many prime numbers are on the cube?

  4. anonymous
    • one year ago
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    2 3 5

  5. kropot72
    • one year ago
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    Correct. So the probability of rolling a prime number is 3/6. The events are independent, therefore the required probability is the product of the two values of probability: \[\large P=\frac{2}{6}\times\frac{3}{6}=you\ can\ calculate\] Note: The fractional result must be simplified.

  6. anonymous
    • one year ago
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    1/6

  7. kropot72
    • one year ago
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    That is correct.

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