Rates, SM-Bank 077 MC

Byron makes $180 selling 20 poetry books on eBay.

All his poetry books are the same price.

How much money will he make selling 11 poetry books?

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$B$

Show Worked Solution

$\text{Cost per poetry book}$	$=\dfrac{180}{20}$
	$=$9$

$\text{Cost for 11 poetry books}$	$=11\times 9$
	$=$99$

$\Rightarrow B$

\(\text{Cost per poetry book}\)	\(=\dfrac{180}{20}\)
	\(=$9\)

\(\text{Cost for 11 poetry books}\)	\(=11\times 9\)
	\(=$99\)