Question
P5.ST.JC.18121203-A1
The average cost of some books is $70.
When a book that costs $88 is added,
the average cost of the books becomes $73.
How many books are there in the end?
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Primary 5 STRATEGIES P5.ST.JC.18121203

05 May 2024, 05:47 AM

The average cost of some books is $70.
When a book that costs $88 is added,
the average cost of the books becomes $73.
How many books are there in the end?
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