The average cost of 3 magazines is $50.
After another magazine that costs $70 is added,
- What is new total cost of all the magazines?
- What is new average cost of all the magazines?
(a)
Total cost of 3 magazines
= 3 x 50
= $150
New total cost of all the magazines
= 150 + 70
= $220
(b)
New total number of magazines
= 3 + 1
= 4
New average cost of all the magazines
= 220 ÷ 4
= $55
Answer(s): (a) $220; (b) $55