445
2a3
+ 64b
+ c53
____
1892
If a and b represent positive single digits in the correctly worked computation above, what is the value of a + b + c ? Choose the correct choice from the following choices
A) 2
B) 7
C) 9
D) 11
E) 12
Adding the digits in unit's place , 5+ 3 + b + 3 = 12 (Since a and b are positive single digits )   =&gt; b = 2   Now adding the digits in ten's place , 4+a + 4 + 5 + 1= 19 (1 has been carried over from unit's place addition)   =&gt; a= 5   Now adding the digits in hundred's place , 4+ 2 + 6 +C + 1= 18 (1 has been carried over from unit's place addition)   =&gt; C= 5   a+b + C = 2+2+5   =12   Answer 12
<result>E</result>
445
2a3
+ 64b
+ c53
____
1892
If a and b represent positive single digits in the correctly worked computation above, what is the value of a + b + c ?