Question

Terry brought 2 and 1\2 dozen chocolate chip cookies. She paid $15 for her purchase. if there were 12 cookies in each dozen,what was the cost per cookie?

Answer 1

$6 per dozen
$6*2 = 12
Half of 6 is 3
12+3=$15

50 cent per cookie
24(2 dozen)*.50=12
Half of a dozen is 6
6*.50=3

12+3=15

Answer 2

$0.50 a cookie.

15/(12*2.5)=c
15/30=c
.5=c