The average cost of 6 guide books is $50.
After a guide book that costs $80 is removed,
- What is new total cost of all the remaining guide books?
- What is new average cost of all the remaining guide books?
(a)
Total cost of 6 guide books
= 6 x 50
= $300
New total cost of all the remaining guide books
= 300 - 80
= $220
(b)
Number of remaining guide books
= 6 - 1
= 5
New average cost of all the remaining guide books
= 220 ÷ 5
= $44
Answer(s): (a) $220; (b) $44