Question

A “popoab” is a six digit number where p, o, a, & b are unique. An...

A “popoab” is a six digit number where p, o, a, & b are unique. An example would be 121245 and 747412 are examples of a “popoab” number.

121212 and 343423 are NOT EXAMPLES OF “popoab” numbers.

How many possible “popoab” numbers are there?

Using the same conditions above how many possible “QWERTWY” numbers are there.

Where Q,W,E,R,T,Y are unique.

***PLEASE SHOW WORK

Math   Statistics-And-Probability   
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