Correct option is D
Trying:
(A×5)+(B×10)=Result
Verifying with given values:
For
14 # 2:
(14×5)+(2×10)=70+10=80
For
10 # 4:
(10×5)+(4×10)=50+20=70
For
20 # 6:
(20×5)+(6×10)=100+30=130
Applying to
8 # 12:
(8×6)+(12×4)=48+48=100
