Answer to Question #343478 in Statistics and Probability for die

Statistics and Probability

Question #343478

How many two-digit numbers can be formed from the digits 1, 2, 3 and 4 if

a. no digit is repeated in any number?

b . repetitions are allowed?

Expert's answer

a. There are $4(3)=12$ numbers.

b. There are $4^2=16$ numbers.

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