Andre picks 252 pounds of apples.
Let's solve the problem step-by-step:
Define variables:
Let M be the number of pounds Maria picks.
Andre picks 3 times M, so Andre picks 3M pounds.
Jane picks 2 times Andre's amount, so Jane picks 2 * 3M = 6M pounds.
Set up the equation:
The total weight of apples is 840 pounds, which is the sum of what each person picks:
M + 3M + 6M = 840
10M = 840
Solve for M: Divide both sides by 10:
M = 84
Find Andre's amount: Andre picks 3M, so:
Andre = 3 * M = 3 * 84 = 252 pounds
Therefore, Andre picks 252 pounds of apples.