The average cost of 5 comics is $40.
After another comic that costs $70 is added,
- What is new total cost of all the comics?
- What is new average cost of all the comics?
(a)
Total cost of 5 comics
= 5 x 40
= $200
New total cost of all the comics
= 200 + 70
= $270
(b)
New total number of comics
= 5 + 1
= 6
New average cost of all the comics
= 270 ÷ 6
= $45
Answer(s): (a) $270; (b) $45