The average cost of 3 comics is $40.
After another comic that costs $80 is added,
- What is new total cost of all the comics?
- What is new average cost of all the comics?
(a)
Total cost of 3 comics
= 3 x 40
= $120
New total cost of all the comics
= 120 + 80
= $200
(b)
New total number of comics
= 3 + 1
= 4
New average cost of all the comics
= 200 ÷ 4
= $50
Answer(s): (a) $200; (b) $50