Question

In a library, 30% of books are on computers, 5% on English, 35% on Science and remaining 900 are on various other fields. How many books on English are there in the library?

Answer 1

Answer:

         150

Step-by-step explanation:

Let b be the total number of books in the library.

The books on computers, English and science account for

  30% + 5% + 35%  =  70%

of the books.  So the remaining 900 books are 30% of the total

⇒  30% of b  =  900

⇒  0.3 × b  =  900

⇒  b  =  900 / 0.3  =  9000 / 3  =  3000.

The number of books on English is then

5% of b  =  0.05 × b  =  0.05 ×  3000  =  5 × 30  =  150.

Answer 2

Step-by-step explanation:

What are your names so i can save your numbersof comupter = 30%