Question

what is the number for 3_digit number that can be formed using the digits 0,1and5without repeating a digit in any number?
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Answer 1

Answer:

4

Step-by-step explanation:

The first position can be occupied by 2 numbers (1,5) because if 0 is selected as the first digit, it won't be a 3 digit number.

Now that the first digit is selected, 2 number are left for the second digit.

And after the second digit is selected, only 1 number is left for the last digit.

Therefore the answer using multiplication principle is 2 x 2 x 1 = 4.