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Postage stamps

Postage stamps

Secondary 2
5 marks
TGM Original Questions

A collector buys \(40\) postage stamps. Each stamp costs either \(\$0.50\) or \(\$1.10\), and the total cost is \(\$31.40\). Let \(x\) be the number of \(\$0.50\) stamps and \(y\) be the number of \(\$1.10\) stamps.

  1. Write down two equations connecting \(x\) and \(y\).[2]
  2. Hence, solve the simultaneous equations obtained in (a) and find the number of stamps of each value.[3]

Solution:

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Answer:(a) \(x+y=40,0.5x+1.1y=31.4\) (b) \(x=21,y=19\)

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