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A crate contains 300 coins and stamps. The coins cost $3 each and the stamps cost $1.5 each. The total value of the items is $825. How many coins are there?

User Laquanna
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1 Answer

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Let the number of stamps be s and the number of coins be c.

This means that s+c=300 and 3c+1.5s=825.

Multiplying the first equation by 3 yields 3s+3c=900.

Subtracting the second equation from this gives that 1.5s=75, and thus s=50.

It follows that c=250, so there are 250 coins.

User Ahmed Sayed
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