Question

Kendrick bought 6 books at the bookstore for a total of $126. If he would have only bought 2 books, how much would he have spent?

Answer 1

Answer:

The cost of 2 books is $ 42.

Step-by-step explanation:

Given :

Books bought = 6

For = $ 126

To find :

Cost of 2 books

Solution :

Method I -

Cost of one book,

⇒ Cost of all books/Number of books bought

⇒ 126/6

⇒ 21

Cost of one book = $ 21

Cost of 2 books,

⇒ Cost of one book × Number of books

⇒ 21 × 2

⇒ 42

Cost of 2 books = $ 42

$\rule{300}{1.5}$

Method II -

Let the cost of 2 books be y

⇒ 126 : 6 : : y : 2

⇒ Mean × Mean = Extreme × Extreme

⇒ 6 × y = 126 × 2

⇒ 6y = 252

⇒ y = 252/6

⇒ y = 42

Cost of 2 books is $ 42

Therefore, the cost of 2 books is $ 42.

Answer 2

Answer:

$42

Step-by-step explanation:

So, Kendrick bought 6 books for $126

So you do 126 / 6 to figure out how much 1 book is which equals 21.

Since we need to find out 2 books, you would multiply one book by 2. So 21 * 2 = 42

Therefore Kendrick would have spent $42