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

[Q]: Problem: income and expenditure of a person are in the ratio 10 : 4 . if the income of the person is rs . 19000 , then find his savings ? 
Options: a ) 79754 , b ) 87689 , c ) 59875 , d ) 11400 , e ) 87648
[A]: d


[Q]: Problem: a college has classes from 10 : 00 am until 1 : 40 pm . in this duration , there are 5 periods . if 5 minutes are provided between each period to leave one class and enter the next class , how many minutes long is each period ? 
Options: a ) 38 min , b ) 41 min , c ) 40 min , d ) 42 min , e ) 52 min
[A]: c


[Q]: Problem: a family has two children . find the probability that both the children are girls given that at least one of them is a girl ? 
Options: a ) 1 / 5 , b ) 1 / 3 , c ) 3 / 7 , d ) 2 / 7 , e ) 3 / 7
[A]:
b