Question

A textbook store sold a combined total 402 of psychology and math textbooks in a week. The number of psychology textbooks sold was two times the number of math textbooks sold. How many textbooks of each type were sold?

Answer 1

The number of textbooks of each type were sold is 134 math and 268 psychology books.

Explanation:

Given:

Total number of math and psychology textbooks sold in a week is 402.

Now, let the number of math textbooks sold be
`x`.

And, the number of psychology textbooks be
`2x`.

According to question:

`x+2x=402`

`3x=402`

Dividing both sides by 3 we get:

`x=134`

So, total number of math textbooks were 134 .

And, total number of psychology textbooks were
`2x=2* 134`

`=268`.

Therefore, the number of textbooks of each type were sold is 134 math and 268 psychology books.