Final answer:
Option c) is the best deal for buying notebooks with a cost of $1.90 per notebook.
Step-by-step explanation:
To determine which option is the best deal for buying notebooks, we need to calculate the cost per notebook for each option. Option a) offers 5 notebooks for $8.75, which means the cost per notebook is $8.75/5 = $1.75. Option b) offers 4 notebooks for $7.95, which means the cost per notebook is $7.95/4 = $1.9875 (rounded to $1.99). Option c) offers 3 notebooks for $5.67, which means the cost per notebook is $5.67/3 = $1.89 (rounded to $1.90).
Based on the calculations, option c) is the best deal as it offers the lowest cost per notebook at $1.90.