In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: a envelop weight 8.5 gm , if 820 of these envelop are sent with an advertisement mail . how much wieght ? 
Options: a ) 6.6 kg , b ) 6.8 kg , c ) 6.7 kg , d ) 6.97 kg , e ) 7.8 kg
[EX A]: d

[EX Q]: Problem: if p / q = 2 / 7 , then 2 p + q = ? 
Options: a ) 11 , b ) 14 , c ) 13 , d ) 15 , e ) 16
[EX A]: a

[EX Q]: Problem: if a ' s height is 20 % less than that of b , how much percent b ' s height is more than that of a ? 
Options: a ) 66.66 % , b ) 66.68 % , c ) 66.766 % , d ) 86.66 % , e ) 25 %
[EX A]:
e