To find the ratio of the number of brownies without nuts to the total number of brownies, we first need to determine the total number of brownies.
Elizabeth baked:
- 3 brownies with nuts
- 13 brownies without nuts
Total number of brownies = 3 + 13 = 16
Now, we can find the ratio of the number of brownies without nuts (which is 13) to the total number of brownies (which is 16):
Ratio = Number of brownies without nuts : Total number of brownies Ratio = 13 : 16
So, the correct answer is 13:16.