The average cost of 6 novels is $60.
After a novel that costs $80 is removed,
- What is new total cost of all the remaining novels?
- What is new average cost of all the remaining novels?
(a)
Total cost of 6 novels
= 6 x 60
= $360
New total cost of all the remaining novels
= 360 - 80
= $280
(b)
Number of remaining novels
= 6 - 1
= 5
New average cost of all the remaining novels
= 280 ÷ 5
= $56
Answer(s): (a) $280; (b) $56