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14 September, 08:25

Koshi creates a password as follows: number, special character, letter, letter, number If there are 12 special characters and Koshi does not repeat a letter or number, how many possibilities are there for his password? a. 702,000 b. 730,080 c. 780,000 d. 811,200

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  1. 14 September, 09:06
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    Number of possibility for 1st character = 10

    Number of possibilities for 2nd character = 12

    Number of possibilities for 3rd character = 26

    Number of possibilities for 4th character = 25

    Number of possibilities for 5th character = 9

    Therefore, number of possibilities for his password = 10 x 12 x 26 x 25 x 9 = 702,000
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