Question
P5.ST.JC.18121200-A1
The average cost of 9 textbooks is $90.
The average cost of 8 textbooks is $30.
What is the cost of 9th book?
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Primary 5 STRATEGIES P5.ST.JC.18121200

30 Jun 2024, 05:27 AM

The average cost of 9 textbooks is $90.
The average cost of 8 textbooks is $30.
What is the cost of 9th book?
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