Question
The average cost of 4 textbooks is $30.
After another textbook that costs $70 is added,
  1. What is new total cost of all the textbooks?
  2. What is new average cost of all the textbooks?
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 4 textbooks is $30.
After another textbook that costs $70 is added,
  1. What is new total cost of all the textbooks?
  2. What is new average cost of all the textbooks?