Math
posted by Jaycee .
Lyle wanted change for a $100 bill. He wanted at least three $20 bills, one $10 bill, one $5 bill and seven $1 bills. What is the least number of bills Lyle could have received?
A. 18
B. 16
C. 17
D. 15
I don't get how to get the answer

How do you get the answer?

(3 * 20) + 10 + 5 + 7 = $82 >> 12 bills
100  82 = 18
10 + 5 + 3 = 18
12 + 3 = 15 
So it's D?

let's go with the minimums and see what we get
3 20's + 1 10 + 1 5 + 7 1's = $82 > 12 bills
so we are short $18
using the least number of bills, I can fill that with
$10 + $5 + 3($1) > 5 bills
total bills = 17 
Sorry but I'm confused. Because they said its D but you said its C
I also don't get why the $82 is $12 
Reiny is right. I can't add. Of course, 12 + 5 = 17.

We need 12 bills to fulfill the minimum requirement.
That totals $82 (check both Ms Sue's and mine)
leaving us $18 short
the minimum way to get $18 is
one ten
one five
3 ones , for a total of 5 more bills
total = 17
BTW, nowhere was it said that $82 is $12.