Question
P5.ST.JC.18121204-A1
The average cost of some books is $50.
When a book that costs $180 is removed,
the average cost of the books becomes $40.
How many books are there in the end?
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Primary 5 STRATEGIES P5.ST.JC.18121204

01 May 2024, 09:40 AM

The average cost of some books is $50.
When a book that costs $180 is removed,
the average cost of the books becomes $40.
How many books are there in the end?
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