Given:
Total number of cookies = 40 cookies
Ratio of chocolate to oatmeal = 5:3
To find the number of oatmeal cookies, first sum up the ratio.
Total sum of ratio = 5 + 3 = 8
Number of oatmeal cookies will be:
[tex]\frac{ratio\text{ of oatmeal}}{\text{total ratio}}\text{ }\ast\text{ total number of cookies}[/tex][tex]\frac{3}{8\text{ }}\text{ }\ast\text{ 40 = 15}[/tex]Therefore, total number of oatmeal cookies = 15