How many different 3 -digit whole numbers can be formed using the digits 4,7 and 9 , assuming that no digit can be repeated in a number?
(A) 6
(B) 3
(C) 5
(D) 12
(E) 9

## Part B: Each correct answer is worth 6.
Using the digits 4,7 and 9 without repeating any digit in a given number, the following 3-digit whole numbers can be formed: 479,497, 749, 794, 947, and 974 .

There are exactly 6 different 3 -digit whole numbers that can be formed in the manner described.