Question
P5.ST.JC.18121200-A1
The average cost of 9 guide books is $30.
The average cost of 8 guide books is $10.
What is the cost of 9th book?
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Primary 5 STRATEGIES P5.ST.JC.18121200

04 Jul 2024, 05:20 PM

The average cost of 9 guide books is $30.
The average cost of 8 guide books is $10.
What is the cost of 9th book?
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