Question 1161538: Counting numbers are to be formed using only the digits 1, 8, and 5. Determine the number of different possibilities for two-digit numbers.
Found 2 solutions by ikleyn, solver91311: Answer by ikleyn(52781) (Show Source):
You can put this solution on YOUR website! .
Any of the 3 digits can occupy the first position,
and any of the 3 digits can occupy the second position.
So, if there is no restriction on repeating the digits, then the answer is 3*3 = 9.
If, in opposite, THERE IS such a restriction, then the answer is 3*2 = 6.
The fact that the problem does not formulate the presence ot the absence of the restriction, is the author's FAULT.
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Solved, explained, answered and completed.
Answer by solver91311(24713) (Show Source):
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