determine the number of possible permutations of two of the five vowels: a, e ,i, o, and u. List them all

ae ai ao au aa ea ee ei eo eu ia ie ii io iu oa oe oi oo ou ua ue ui uo uu

that's long

there is 25 possible

i have that but my problem is that my work doesn't match up.. i'm trying to find the number using a formula and thought that (5 over 2) was the right formula, but that ends up being 10, which would be right if I'm not supposed to count repeats (like ae and ea) but since it says find the permutations i think I am. So i'm not sure what formula is the right one to use

u do count ae with ea

yes but what formula gives me 25 as a number? not 5! and not (5 over 2)

i'm pretty sure i'm missing something really basic, i just can't figure it out

I remembered!

there is 5 possible combinations for "a" right?

aren't there 9 if you count the ones that are switched? aa ae ai ao au ea ia oa ua

well I'm saying for when a is the first one

oh, yeah

so isn't there 5

ok what about "b" there is 5 right

yeah

so, this would go for all 5 of them to its 5+5+5+5+5 or 5x5= 25 got that?

yes, but that's not really using any equation that actually relates to permutations

this is a way to show the equation in a more "easy" way

good job understanding this way, not many people understanding this

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