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Question
In a book fair, 30 fiction books of m dollars each and 45 non-fiction books of n dollars each are sold. Which of the following gives the total earnings made by selling the two types of book?
In a book fair, 30 fiction books of m dollars each and 45 non-fiction books of n dollars each are sold. Which of the following gives the total earnings made by selling the two types of book?
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Solution
The correct option is A (30m + 45n) dollars
Cost of 1 fiction book = m dollars
Hence, cost of 30 fiction books = 30m dollars
Cost of 1 non-fiction book = n dollars
Hence, cost of 45 non-fiction books = 45n dollars
Therefore, the total earnings made by selling 30 fiction books and 45 non-fiction books is (30m + 45n) dollars.
Cost of 1 fiction book = m dollars
Hence, cost of 30 fiction books = 30m dollars
Cost of 1 non-fiction book = n dollars
Hence, cost of 45 non-fiction books = 45n dollars
Therefore, the total earnings made by selling 30 fiction books and 45 non-fiction books is (30m + 45n) dollars.
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