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math

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Cher has forgotten the combination to her locker. She knows it consists of four numbers -- 3, 5, 7, and 9 -- but she can't recall the order. She decides to try every possible order until she gets the right one.

How many possible orders are there?

  • math - ,

    im pretty sure its 256. These r permutations right

  • math - ,

    Four possibilities for the first number.

    Four possibilities for the second number

    Therefore, 4x4 = 16 possibilities for the first two numbers.

    Four possibilities for the third number

    Therefore, 16x4 = 64 possibilitites for the first three numbers.

    I think you can now see what the total number of arrangements of all four numbers will be.

  • math - ,

    The Correct Answer is: 24 orders

  • math - ,

    Cher has forgotten the combination to her locker. She knows it consists of four numbers - 3, 5, 7, and 9 - but she can’t recall the order. She decides to try every possible order until she gets the right one. How many possible orders are there?

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