To find the cost of each cup of coffee excluding the tip, we first need to determine the total cost of the coffee alone.
- Subtract the tip from the total amount: \[ 18.25 - 2.00 = 16.25 \]
This means the total cost of the coffee for the 5 people is $16.25.
- Next, divide the total cost of the coffee by the number of cups (5): \[ \frac{16.25}{5} = 3.25 \]
So, the cost of each cup of coffee, not including the tip, is $3.25.