The average cost of 7 novels is $30.
After a novel that costs $60 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 7 novels
= 7 x 30
= $210
New total cost of all the remaining novels
= 210 - 60
= $150
(b)
Number of remaining novels
= 7 - 1
= 6
New average cost of all the remaining novels
= 150 ÷ 6
= $25
Answer(s): (a) $150; (b) $25