In a certain code, the symbol for 0 (zero) is @ and for 1 is $. There are no other symbols for all other numbers greater than one. The numbers greater than 1 are to be written only by using the two symbols given above. The value of the symbol for 1 doubles itself every time it shifts one place to the left. Study the following examples :
'0' is written as @
'1' is written as $
'2' is written as $@
'3' is written as $ $
'4' is written as $ @ @ and so on
What is the average of $ $ $ @ @ and $ $ @ @ ?

Options

A. $ @ @ @ @
B. $ $ $ $ @
C. $ @ $ @ @
D. $ @ @ $ @

Answer

C

Explanation

Average of 11100 and 1100. We convert them into decimal as : 28 and 12. Average is 20. 20 is represented in binary as 10100.