Answer :
Your budget minus The room is $65, now if its $12per person to come and your including yourself in the the number, then $12x5=$60 and now your out of money, so the answer is 5.
If Carrie starts out with $75.00 - $10.00 for room charge that leaves her with $65.00
$65.00 ÷ $12.00 per person
65 ÷ 12 = 5.42
So, that means Carrie can invite 5 of her friends.
Hope this helps. :)