Answer:
To maximize the profit, 35 crates of oranges, 35 crates of grapefruits and 30 crates of avocados should be shipped
Step-by-step explanation:
Maximum number of crates in each truckload = 100
Least number of crates that must be oranges = 20
Least number of crates that must be grapefruits = 10
Least number of crates that must be avocados = 30
Since the maximum number of crates in each truckload is 100 and there must be at least as many crates of oranges as grapefruits, to maximize profit, the least number of crates of oranges must be 35, the least number of crates of grapefruits must also be 35 and the least number of crates of avocados must be 30.