Final answer:
Each friend gets 3/10 of a pan of brownies, as Sue baked 3 pans and cut each into 10 pieces, which gives 3 pieces per friend from a total of 10 pieces per pan.
Step-by-step explanation:
To determine what equal portion of brownies each friend got, we need to calculate the total number of pieces and then divide that number by the number of friends. Sue baked 3 pans of brownies and cut each pan into 10 pieces, making a total of 30 pieces. Since she has 10 friends, we divide the total number of pieces (30) by the number of friends (10), which results in 3 pieces per friend. Therefore, each friend receives 3 pieces, and since each pan was divided into 10 pieces, each friend gets 3/10 of a pan of brownies.
Option 2: 3/10 of a pan of brownies is the correct answer to the question about the equal portion of brownies each friend gets.