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Compute the permutations and combinations. How many two-digit, positive integers can be formed from the digits 1, 3, 5, and 9, if no digit is repeated? A. 12 B. 16 C. 24
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Compute the permutations and combinations.

How many two-digit, positive integers can be formed from the digits 1, 3, 5, and 9, if no digit is repeated?

A. 12
B. 16
C. 24

User Sachinpkale
by
7.8k points

2 Answers

4 votes

the correct answer to this question is 12

User Thomas Guillory
by
8.4k points
2 votes
permuation is no repeats
that is n!
2 digits
with the 4 numbres
so
first number can be 4 possible numbers
2nd can be 3 because 1 has been used

so 4*3=12
12 is answer
A is answer
User Omar Magdy
by
8.0k points
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