Question
P5.ST.JC.18121201-A2
The average cost of four books is $90.
Three of the books cost $30, $40 and $40.
What is the cost of the 4th book?
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Primary 5 STRATEGIES P5.ST.JC.18121201

02 Jun 2024, 01:19 AM

The average cost of four books is $90.
Three of the books cost $30, $40 and $40.
What is the cost of the 4th book?
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