A new system of numbers is defined with only 4 symbols A, B,C & D indicating decimal numbers 0,1,2 & 3 respectively. The numbers 4,5,6.. will be written as BA, BB, BC,. In this system, BAD will correspond to which decimal number?

a) 5

b) 22

c) 19

d) 43

e) 104

Answer:a

Step-by-step explanation: