Answer:

ARITHMETIC: How many four-digit numbers can be formed from the numbers 1, 4, 6, and 9 if repetition of digits is not allowed?

C. 128

Step-by-step explanation:

Hope it helps

Answer:

Since the numbers are 1,4,6 and 9 and repetition is not allowed we can say that:

4 * 3 * 2 * 1 = A. 24

Units place can be filled by 4 ways.

Tens place can be filled by 3 ways.

Hundreds place can be filled by 2 ways.

Thousands place can b filled by 1 ways.

Therefore;

A. 24

Note that the question requires the knowledge in combinations and permutations in order to check the solution must be 4!.