Question

Question #d7703

Answer 1

$64

Explanation:

Since the average of the first four items were `$40`, the total cost of the first four items was `4*$40=$160`

Similarly, the average of the next six items were `$80`, so the total cost of the next six items was `6*$80=$480`

The total cost of all 10 items was `$480+$160=$640`

The average is calculated by dividing the total cost by the total number of items:

total cost = `$640`
total number = `10`

`($640)/10=$64`