Question: A six -digit code is used to distinguish between different regions. The code uses numbers between 1 and 7 , inclusive. a. How many different

A six-digit code is used to distinguish between different regions. The code uses numbers between 1 and 7, inclusive.

a.

How many different codes are available foruse? (Assume that any six-digit number can be used as acode.)

b.

The first three digits of a code for a particular region are 442

2. If no other region has these first three digits as part of itscode, how many codes can exist in thisregion?

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