In this task, you need to provide the correct option for a given problem from the provided options.
--------
Question: Problem: the ratio of two quantities is 4 : 3 . if each of the quantities is decreased by 8 , their ratio changes to 3 : 1 then the smallest number is ?
Options: a ) 5.2 , b ) 6.9 , c ) 9.6 , d ) 7.8 , e ) 4.7

Answer: c

Question: Problem: in a class total 34 students , 16 are have a brother , 15 are have sisters , 9 students do n ' t have either brothers or sisters . find the number of students having both brother and sisters .
Options: a ) 4 , b ) 5 , c ) 6 , d ) 7 , e ) 8

Answer: c

Question: Problem: the ratio of the money with ravi and giri is 6 : 7 and that with giri and kiran is 6 : 15 . if ravi has $ 36 , how much money does kiran have ?
Options: a ) $ 36 , b ) $ 42 , c ) $ 60 , d ) $ 75 , e ) $ 105

Answer:
e