Subject: mathqa
Question: a producer of tea blends two varieties of tea from two tea gardens one costing rs 18 per kg and another rs 20 per kg in the ratio 5 : 3 . if he sells the blended variety at rs 22 per kg , then his gain percent is
Option: 
A: 13 %
B: 17 %
C: 14 %
D: 12 %
Answer: B