Subject: mathqa
Question: because he ’ s taxed by his home planet , mork pays a tax rate of 40 % on his income , while mindy pays a rate of only 30 % on hers . if mindy earned 5 times as much as mork did , what was their combined tax rate ?
Option: 
A: 34 %
B: 31.67 %
C: 32.5 %
D: 35 %
Answer: B