Question
P5.ST.JC.18121208-A1
The average cost of some books is $24.
After 5 new books are added,
it adds another $12 to the total cost.
As a result, the average cost of all the books decreases to $15.
How many books are there at first?
3 m
∑

Click ∑ button first when a symbol is required. X

Symbols

Enter the numerator and denominator


Enter value


2
Question Solution

1-minute grace period



When you click the Next button, you will be given 1-minute grace period to decide whether to do the next question type.

The question will be marked as incorrect if you exceed 1 minute and leave the question page.

Click the Back button instead if you would like to return to the topic page.

STUDENT

Primary 5 STRATEGIES P5.ST.JC.18121208

01 May 2024, 03:17 PM

The average cost of some books is $24.
After 5 new books are added,
it adds another $12 to the total cost.
As a result, the average cost of all the books decreases to $15.
How many books are there at first?
Navigations
Contact Us
Members
Links