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?

• A. (30m + 45n) dollars
• B. (45m + 30n) dollars
• C. 75 mn dollars
• D. 75m dollars

Answer 1

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.