Final answer:
By dividing 15 ounces of trail mix by 4 people, we find that each person receives 3.75 ounces of trail mix.
Step-by-step explanation:
To determine how much trail mix each person gets, we need to divide the total amount of trail mix by the number of people sharing it. Gavin has 15 ounces of trail mix and wants to share it with 3 friends and himself, making a total of 4 people. To find out how much each person gets, divide 15 ounces by 4.
15 ounces ÷ 4 = 3.75 ounces per person.
Therefore, each person gets 3.75 ounces of trail mix.