Question

b. Six packages had weights of 2 lb, 5 lb, 7 lb, 5 lb, 9 lb, and 8 lb. What’s the average weight of the packages?

Answer 1

6 lb.

Explanation:

The average weight = sum of all the weights / number of packages

= (2+5+7+5+9+8) / 6

= 36/6

= 6 lb.

Answer 2

Answer: 6 lb

Explanation:

The formula to calculate the average of n elements

`X_1, X_2, X_3, X_4,..., X_n` is:

`{\displaystyle {\overline {X}}}=(\sum_(n=1)^(n)X_n)/(n)`

In this case we have the weight of six packages

2 lb, 5 lb, 7 lb, 5 lb, 9 lb, and 8 lb

Notice that n = 6

So the average weight is:

`{\displaystyle {\overline {X}}}=(2+5+7+5+9+8)/(6)`

`{\displaystyle {\overline {X}}}=(36)/(6)`

Finally the average weight of the packages is:

`{\displaystyle {\overline {X}}}=6\ lb`