Question

how many 2-digit numbers can be formed using only the digits 2, 3, 5, and 6, if the digits are not repeated within a number?

Answer 1

So if you have a two digit number,then what are your choices for your first digit? You can have 2,3,5, or 6. So there are 4 possible choices for your first digit. Now what about the second digit, how many possibilities do you have?

Answer 2

16?

Answer 3

wait is it 12?

Answer 4

@Kainui is it 12?

Answer 5

@wifibasedgod can you check my answer

Answer 6

I think its 12

Answer 7

@eHoaX is my answer correct

Answer 8

yeah n=4 r=2

4nPr2=12

Answer 9

ok