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what?

9C3 =
. 9!
------- =
6! 3!
9 x 8 x 7
------------- = 84 <==ANSWER
3 x 2 x 1
I hope that helps!! :-)

okay thats what i thought can you help me with one other problems?

sure if i can figure it out

if u can that would be great!

why is it \(\binom{9}{3}\) ?

@satellite73 what bro ?

pretty sure that is not right

i guess but i m just trying to help -_-

hey no problem, i just don't think "9 choose 3" is the right way to solve it

also notice that the "9 choose 3" approach ignores completely the number of people in each car

i got it too satellite73 is correct my bad -_-

it all comes from the counting principle |dw:1378173059624:dw|

this is probably easiest if you do it with numbers
lets imagine there are 1000 jobs total

700 are done by john, 300 by meghan

\(.02\times 700=14\) mistakes are made by john
and \(.04\times 300=12\) by meghan

so it is pretty damned close, but john makes more mistakes

can we do one more proeblem... sorry i keep asking but these few have been bothering me