SSC CGL Tier II 12 Apr 2015 Paper

Question : 73 of 100

Marks: +1, -0

In a library the ratio of story books and other books is 7 : 2 and there are 1512 story books. Due the collection of some more story books the said ratio becomes 15 : 4. The number of story books collected is

Validate

Solution:

(1) Story books ⇒ 1512
Other books ⇒

2 /7 × 1512= 432

Additional story books = x

∴{1512+x}/{432}= {15}/{4}

⇒6048+4 x=432 × 15=6480

⇒ 4 x=6480-6048=432

⇒ x=\ {432}/{4}=108

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