Number System
There are seven boys and four girls in a row. In how many ways can they be seated in the row so that all the girls do not sit together ?

11! - 7! x 4!
11! - 8! x 4!
11! - 8! x 3!
10! - 7! x 3!

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number System
The peresent age of the father and the son are in the ratio of 8:3. After 12 years the ratio of their ages will be 2:1. What is the sum of the present age of the father and the son ?

66 years
69 years
67 years
68 years

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP