How many 2-digit numbers can be formed using only the digits 2, 3, 5, and 6, if the digits are not be repeated within a number? Please Help!!! This is a Permutation

Question

How many 2-digit numbers can be formed using only the digits 2, 3, 5, and 6, if the digits are not be repeated within a number?  Please Help!!! This is a Permutation

anonymous · Answer

You have a permutation without repetition so you want which formula do you know can help you solve for this?

anonymous · Answer

uh i don't know...

campbell_st · Answer

well for the 1st digit you have 4 choices... and the 2nd digit there will be 3 choices..

so by the fundemental theorem of counting

you have 4 x 3 ways

anonymous · Answer

I know that formula but i need to figure out how to make 2 digit numbers

anonymous · Answer

with them

campbell_st · Answer

well you don't need a formula... 

for this question you just need to know the number of choices at each stage,, and multiply the number of choices...

campbell_st · Answer

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anonymous · Answer

ok thank you so much!