The mean weight of four trucks were 3,700 pounds.The first truck was 3,250 pounds.The second truck was 3,890 pounds.Tue lady truck was 3,640 pounds.Egat did the fourth truck weigh
Ideally, in order for us to have a 3,700 pound average, each of the four trucks would be 3,700 pounds. Added up, we would have a total of: 14,800 pounds (3,700×4)
Let's see how much pounds we already have:
3,250 + 3,890 + 3,640 = 10,780
Now we need to find how much pounds we are missing: 14,800 - 10,780 =