In a library 5 percent books are in English, 10 percent of the remaini...
5% of books are in English,
10% of remaining books are in Hindi,
15% of remaining books are in Sanskrit.
Remaining books are in french = 11628
Calculation:
Let the total books in the library be 100%
According to question:
5% of books are in English
Remaining books = 100 - 5 = 95%
10% of remaining are in hindi = 10% of 95 = 9.5
Remaining books = 95 - 9.5 = 85.5%
15% of remaining books are in sanskrit = 15% of 85.5 = 12.825%
Remaining books = 85% - 12.825% = 72.675%
According to question:
72.675% = 11628
⇒ 1% = (11628/72.675)
⇒ 100% = (11628/72.675)× 100 = 16000
∴ Required value = 16000
View all questions of this test
In a library 5 percent books are in English, 10 percent of the remaini...
Given information:
- 5% of the books are in English
- 10% of the remaining books are in Hindi
- 15% of the remaining books are in Sanskrit
- 11628 books are in French
To find:
The total number of books in the library
Solution:
Let the total number of books in the library be x.
Books in English = 5% of x = 0.05x
Remaining books = x - 0.05x = 0.95x
Books in Hindi = 10% of (remaining books) = 0.10(0.95x) = 0.095x
Remaining books = 0.95x - 0.095x = 0.855x
Books in Sanskrit = 15% of (remaining books) = 0.15(0.855x) = 0.12825x
Remaining books = 0.855x - 0.12825x = 0.72675x
Books in French = 11628
Therefore, we have the equation:
0.05x + 0.095x + 0.12825x + 11628 = x
0.27325x = 11628
x = 42534.71
Since the number of books must be a whole number, we round up to the nearest integer:
x = 42535
Hence, the total number of books in the library is 42535, which is closest to option (c) 16000.
In a library 5 percent books are in English, 10 percent of the remaini...
DETAILED SOLUTION
let total no. of books be X
5%of X = X/20,no.of books in hindi
X-20/X=19X/20remaining books excluding books in hindi
19X/20×10/100=19X/200 no. of books in English
3rd step X-X/20+19X/200=171X/200no. of books excluding hindi and English books
171X/200×15/100=513X/4000 no.of books in sanskrit
X-X/20+19X/200+513X/4000=2907X/4000no. of books in French
2907X=11628×4000
=16000 total no. of books