The average cost of 6 books is $80.
After 2 books are removed,
the average cost of the remaining books is $50.
- What is the total cost of the 2 books that are removed?
- What is the average cost of the 2 books that are removed?
(a)
Total cost of 6 books
= 6 x 80
= $480
Number of remaining books
= 6 - 2
= 4
Total cost of the remaining books
= 4 x 50
= $200
Total cost of the 2 books that are removed
= 480 - 200
= $280
(b)
Average cost of the 2 books that are removed
= 280 ÷ 2
= $140
Answer(s): (a) $280; (b) $140