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 certain lab experiments with white and brown mice only . in one experiment , 2 / 3 of the mice are white . if there are 11 brown mice in the experiment , how many mice in total are in the experiment ? 
Options: a ) 39 , b ) 33 , c ) 26 , d ) 21 , e ) 10
[EX A]: b

[EX Q]: Problem: i chose a number and divide it by 8 . then i subtracted 100 from the result and got 6 . what was the number i chose ? 
Options: a ) 600 , b ) 700 , c ) 800 , d ) 900 , e ) 848
[EX A]: e

[EX Q]: Problem: zinc and copper are melted together in the ratio 9 : 11 . what is the weight of melted mixture , if 27 kg of zinc has been consumed in it ? 
Options: a ) 58 kg , b ) 60 kg , c ) 64 kg , d ) 70 kg , e ) none
[EX A]:
b