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Create random number from 3-10

  1. 05-05-2009, 10:33 AM #1
    maacmaac
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    Create random number from 3-10

    I have a formula to generate a random number between 0 and 10.
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    I only need a number between 3 and 10 and can't figure out how to modify the formula for this. Any help to modify code is appreciated. Thanks.
    Last edited by maacmaac; 05-05-2009 at 11:07 AM.
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  2. 05-05-2009, 10:41 AM #2
    oldchippy
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    Re: Create random number from 3-10

    Hi,

    Use RANDBETWEEN

    =RANDBETWEEN(3,10)
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  3. 05-05-2009, 10:42 AM #3
    shg
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    Re: Create random number from 3-10

    =INT(8*RAND()) + 3

    Or =RANDBETWEEN(3,10) with the Analysis Toolpak.
    Entia non sunt multiplicanda sine necessitate
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  4. 05-05-2009, 10:42 AM #4
    Special-K
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    Re: Create random number from 3-10

    =round((rand() *7 + 3),2)
    Regards
    Special-K

    Ensure you describe your problem clearly, I have little time available to solve these problems and do not appreciate numerous changes to them.
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  5. 05-05-2009, 10:43 AM #5
    shg
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    Re: Create random number from 3-10

    Don't think so, Special-K.
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  6. 05-05-2009, 10:44 AM #6
    oldchippy
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    Re: Create random number from 3-10

    =RANDBETWEEN(3,10)
    Don't think so shg
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  7. 05-05-2009, 10:45 AM #7
    shg
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    Re: Create random number from 3-10

    Pardon, OC?
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  8. 05-05-2009, 10:49 AM #8
    oldchippy
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    Re: Create random number from 3-10

    Sorry mate, I was sure I read that as

    =RANDBETWEEN(3,1)

    Need to change eyes
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  9. 05-05-2009, 11:06 AM #9
    maacmaac
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    Re: Create random number from 3-10

    Didn't expect so many solutions but much appreciated. Good to know for future reference.

    I ended up using =INT(8*RAND()) + 3 and/or =round((rand() *7 + 3),2) . Could not use the Randbetween function as my company is still using Office 2000.

    Thanks for comments.
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  10. 05-05-2009, 02:14 PM #10
    shg
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    Re: Create random number from 3-10

    If you use ROUND, the end-point numbers will occur with half the likelihood of the interior numbers.

    To see a quick example, copy =ROUND(3 * RAND(), 0) down 600 rows. On average, you'll see 100 0's, 200 1's, 200 2's, and 100 3's.
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  11. 05-05-2009, 05:32 PM #11
    maacmaac
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    Re: Create random number from 3-10

    Good point. Thanks for the tip...another one I can file away for future reference.
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