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# How many packages of diapers can you buy with $\$ 40$if one package costs$\$8$?

Last updated date: 13th Jun 2024
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According to the question, the cost of one package is equal to $\$ 8$. We can also say this as with the cost of$\$8$, we can buy one package.
This implies that with the cost of $\$ 1$, the number of packages obtainable is$\dfrac{1}{8}$. Finally, using the unitary method, the number of packages obtainable with the cost of$\$40$ will be equal to $40$ times that number of packages obtainable with the cost of $\$ 1$. Therefore, the number of packages of diapers which can be bought with$\$40$ is given by
$n = 40 \times \dfrac{1}{8}$
$\Rightarrow n = 5$
Hence, the number of packages we can buy with $\$ 40$is equal to$5$. Note: The number of packages obtainable with$\$1$ is found to be equal to $\dfrac{1}{8}$, which is determined by the unitary method. This seems absurd, as the number of packages cannot be fractional. But we must not worry about this absurdity, as the unitary method will always give the correct result. For using the unitary method, we must know the cost of 1 unit of an item. If we are not provided with the cost of 1 unit, then we will find it by dividing the price by the number of units.