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Let, original cost price of an orange is x dollar.

At 40% discount, the price of an orange is

=60% of x =60x100=3x5Dollar

According to the question

123x5-12x=4 =12×53x-12x=4

=20x-12x=4 =20-12x=4 =8x=4

∴x=84=2

∴Number of oranges that can be purchased by 24 dollars=242= 12 (answer)

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