The average cost of 8 books is $50.
After 2 books are removed,
the average cost of the remaining books is $40.
- 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 8 books
= 8 x 50
= $400
Number of remaining books
= 8 - 2
= 6
Total cost of the remaining books
= 6 x 40
= $240
Total cost of the 2 books that are removed
= 400 - 240
= $160
(b)
Average cost of the 2 books that are removed
= 160 ÷ 2
= $80
Answer(s): (a) $160; (b) $80