Question
P5.ST.JC.18121201-A2
The average cost of four books is $90.
Three of the books cost $20, $60 and $70.
What is the cost of the 4th book?
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Primary 5 STRATEGIES P5.ST.JC.18121201

01 Jun 2024, 05:01 PM

The average cost of four books is $90.
Three of the books cost $20, $60 and $70.
What is the cost of the 4th book?
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