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anonymous

  • one year ago

Could anyone please help me with this problem? Assume that 4 digits are selected at random from the set {1,3,7,8,9} and are arranged in random order. What is the probability that the resulting 4-digit number is less than 8000?

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  1. anonymous
    • one year ago
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    the question states "what is the probability"

  2. anonymous
    • one year ago
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    ok sorry i did not see it

  3. anonymous
    • one year ago
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    I can help you!

  4. anonymous
    • one year ago
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    We have a four-digit number, and we want it to be less than 8000. One way to find the probability would be to look at every possible 4-digit number which uses the correct combination of digits, but there's a shorter way to do things.

  5. anonymous
    • one year ago
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    If we want the number to be below 8000, what can you tell me about the first digit?

  6. anonymous
    • one year ago
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    The first digit has to be 1,3,or 7.

  7. amistre64
    • one year ago
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    how many number can we make in total?

  8. amistre64
    • one year ago
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    can we assume the digits can be repeated, like: 1111?

  9. anonymous
    • one year ago
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    There is no repetition

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