A collection of 8 backpacks has a mean weight of 14 pounds. A different collection of 12 backpacks has a mean weight of 9 pounds. What is the mean weight of the 20 backpacks? The mean weight is pounds.

11

Step-by-step explanation:

Given:

A collection of 8 backpacks has a mean weight of 14 pounds

A different collection of 12 backpacks has a mean weight of 9 pounds

Question asked:

What is the mean weight of the 20 backpacks ?

Solution:

For first collection of  backpacks.

As we know:

For Second collection of  backpacks.

Now, we will find the mean weight of the 20 backpacks altogether.

Mean weight of the 20 backpacks = Total sum of observations divided by total number of observations

Combined Mean =

                            =

Therefore, the mean weight of the 20 backpacks is 11.

answer: the 4 kilogram bag

step-by-step explanation: this is because if you divide the number of kilograms into the total it will tell you how much each individual kilogram would be worth. 2 kilos is 7 and change 3 would be around 6 ish and the 4 kilo would be 4.6 and change and the 5 kilos would be like 4.88