Question

A shop sells books at different prices. If x books are sold at ₦500 each, y books are sold at ₦600 each, and z books are sold at ₦900 each, how many books are sold altogether?

a) x + y + z
b) xy + yz + zx
c) x * y * z
d) x + 600y + 900z

Answer 1

To find the total number of books sold, add the quantities of books sold at different prices together, resulting in the formula x + y + z. We are only summing up the number of books, irrespective of their individual prices.

Step-by-step explanation:

The question refers to the total number of books sold, where x books are sold at ₦500 each, y books are sold at ₦600 each, and z books are sold at ₦900 each. To find the total number of books sold, we simply need to add up the quantities of each type of book sold. Hence, the correct answer is a) x + y + z.

The price at which each book is sold is not relevant when computing the total quantity of books, which is why we do not multiply or add the prices to the quantities. We are only summing up the number of books, irrespective of their individual prices.