The average cost of 5 magazines is $20.
After another magazine that costs $80 is added,
- What is new total cost of all the magazines?
- What is new average cost of all the magazines?
(a)
Total cost of 5 magazines
= 5 x 20
= $100
New total cost of all the magazines
= 100 + 80
= $180
(b)
New total number of magazines
= 5 + 1
= 6
New average cost of all the magazines
= 180 ÷ 6
= $30
Answer(s): (a) $180; (b) $30