In this task, you need to provide the correct option for a given problem from the provided options.

[EX Q]: Problem: income and expenditure of a person are in the ratio 5 : 4 . if the income of the person is rs . 19000 , then find his savings ?
Options: a ) 3800 , b ) 3607 , c ) 3608 , d ) 3602 , e ) 3603
[EX A]: a

[EX Q]: Problem: set a consists of the integers from 4 to 15 , inclusive , while set b consists of the integers from 7 to 20 , inclusive . how many distinct integers do belong to the both sets at the same time ?
Options: a ) 5 , b ) 7 , c ) 8 , d ) 9 , e ) 10
[EX A]: d

[EX Q]: Problem: if p and q are both odd prime numbers andp < q , then how many different positive integer factors does 2 pqhave ?
Options: a ) 3 , b ) 4 , c ) 6 , d ) 8 , e ) 12
[EX A]:
d