Answer:
Option C -12
Step-by-step explanation:
Given : A notebook costs $2.65 when the CPI is 182.
To find : In 1983, how many notebooks could you buy with $18?
Solution :
The formula of CPI is
[tex]CPI=\frac{\text{Cost of nb in given year}}{\text{Cost of nb in base year}}\times 100[/tex]
Let n number of notebooks buy.
A notebook costs is $2.65.
The cost of n notebook is 2.65n.
The cost of notebook in base year is $18
CPI=182
Substitute all the values,
[tex]182=\frac{2.65n}{18}\times 100[/tex]
[tex]n=\frac{182\times 18}{2.65\times 100}[/tex]
[tex]n=\frac{3276}{265}[/tex]
[tex]n=12.3[/tex]
Approximately, The number of notebooks are 12.
Therefore, Option C is correct.
