Question
The average cost of 3 story books is $30.
After a story book that costs $70 is removed,
  1. What is new total cost of all the remaining story books?
  2. What is new average cost of all the remaining story books?
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

The average cost of 3 story books is $30.
After a story book that costs $70 is removed,
  1. What is new total cost of all the remaining story books?
  2. What is new average cost of all the remaining story books?