Final answer:
First, the total number of brownies is calculated by multiplying the number of pans by the number of brownies each pan makes resulting in 30 brownies. The quantity of brownies Jill gave away was calculated by multiplying 3/5 by the total quantity of brownies which equaled 18 brownies. Therefore, Jill gave away 18 brownies to her friends.
Step-by-step explanation:
First, let's calculate the total number of brownies by multiplying the quantity of full pans (3) by the number of brownies each pan can make (10). The result is 30 brownies.
Since Jill gave away 3/5 of the total brownies, we can determine the number of brownies she gave away by multiplying 30 brownies by 3/5.
30 * 3/5 = 18 brownies.
So, Jill gave 18 brownies to her friends.
Learn more about fractional multiplication