Answer:
Lisa got a better deal and saved $1.50
Explanation:
first you have to find what the price for one avocado is
for sarah, you would do 2.4/3 to get 0.8
for lisa, 2.5/5 to get 0.5
to double check you can do 0.5 times 5 to get 2.5 and 0.8 times 3 to get 2.4
if sarah bought 5 avocados she would pay $4.00 instead of lisa's deal which is $2.50 for 5
hope this helps!