Each customer of Mobil Credit Corporation is given a -digit number for computer

Question

Each customer of Mobil Credit Corporation is given a -digit number for computer identification purposes. a. If each digit can be any number from to , how many different account numbers can they have? (1 point) Get help entering answers TT This problem has multiple parts which are revealed sequentially after the preceding part has been answered correctly. Each customer of Mobil Credit Corporation is given a 9-digit number for computer identification purposes. a. If each digit can be any number from 0 to 9, how many different account numbers can they have? Answer: 3628800 b. How many different account numbers can they have if the digits were only 3 or 8? Answer 512 Note: Your answers should be integers. Do not enter commas in your answers. For example, enter 1234 and not 1,234, etc.

Explanation / Answer

a)

As there are 10 digits from 0 to 9, then there are

#ways = 10^9 = 1 000 000 000 ways [ANSWER]

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b)

If there are only 2 ways for each digit there are

#ways = 2^9 = 512 [ANSWER]

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