Answer:
(A.) $0.50 per candy bar
(B.) 2 candy bars per dollar
(C.) $6 per dozen
Explanation:
The store sells 24 candy bars for $12 . The three unit rate that can be used to describe this sale are
Let us confirm for option A
24 candy bars sale for $12
1 candy bar will sale for ?
cross multiply
12/24 = 1/2 = $0.5
A is right and it is a unit rate
Let us confirm for option B
24 candy bars sale for $12
2 candy bars will sale ?
(2 × 12)/24 = 24/24 = $1
B is right and it is a unit rate
Let us confirm for option C
Note that a dozen is 12 bars
24 candy bars sale for $12
12 candy bars will sale ?
(12 × 12)/24 = 144/24 = $6
C is right and it is a unit rate
Let us confirm for option D
24 candy bars sale for $12
10 candy bars sale for ?
(10 × 12) /24 = 120/24 = $5
Option d is wrong it is not a unit rate. The unit rate here should be 2 candy bar per dollar.