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anonymous

  • 4 years ago

The zip code of a location consists of five digits chosen from the set D shown below. D = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} The set M represents the digits in one of the zip codes for Miami. M = {3, 3, 1, 9, 0} The set C represents the digits in one of the zip codes for Cooper City. C = {3, 3, 3, 3, 0} How many prime numbers are in the set ? M u C

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  1. mathmate
    • 4 years ago
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    We are not supposed to list duplicates in a set, for example, M={3,1,9,0} C={3,0} So M union C = {3,1,9,0} with duplicates removed. How many prime numbers are there (1 is neither prime nor composite)

  2. anonymous
    • 4 years ago
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    4

  3. mathmate
    • 4 years ago
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    Zero is not a prime. One is neither prime nor composite. Nine is a composite. So how many primes are left in \(M \cup C\) ?

  4. anonymous
    • 4 years ago
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    @mathmate

  5. mathmate
    • 4 years ago
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    Yes, do you have a question?

  6. anonymous
    • 4 years ago
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    i have the same question....so there is only one prime #

  7. mathmate
    • 4 years ago
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    Yes, that is correct. Which one is it?

  8. anonymous
    • 4 years ago
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    3

  9. mathmate
    • 4 years ago
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    Correct. Is everything clear to you, or you could use some more explanation?

  10. anonymous
    • 4 years ago
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    every thing is clear thanks a lot :)

  11. mathmate
    • 4 years ago
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    You're very welcome! :)

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