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Olympiad-Math
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Class 5
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Computation Operations
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Q)
A book seller bought 12 copies of a book. He sold each of them at \$ 20 and thus made a profit of \$ 24 by selling all the books. What was the Cost Price of a book?
( A ) \$10
( B ) \$20
( C ) \$18
( D ) \$12
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