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Math Help - please help. Thanks

  1. #1
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    please help. Thanks

    Sam has 4 digit bank code number that uses one button from each row. How many different possibilities for the bank no.?
    1 2 3
    4 5 6
    7 8 9
    0
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  2. #2
    MHF Contributor
    Joined
    Mar 2007
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    Talking

    Quote Originally Posted by twiglight View Post
    Sam has 4 digit bank code number that uses one button from each row. How many different possibilities for the bank no.?
    1 2 3
    4 5 6
    7 8 9
    0
    How many possible choices does he have for the first digit?

    How many possible choices does he have for the second digit?

    How many possible choices does he have for the third digit?

    Now use whatever method they taught you (plugging into a formula, making a "tree", etc) to find the total number of combinations.

    Have fun!
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