If the tens digit of positive integers j, y are 6, how many values of the tens digit of 2(j+y) can be there? Choose the correct choice from the following answers:
A) 2
B) 3
C) 4
D) 5
E) 6
If the tens digit of positive integers j, y are 6, how many values of the tens digit of 2(j+y) can be there?   A. 2   B. 3   C. 4   D. 5   E. 6   -&gt; If j=y=60, 2(j+y)=240 is derived. If j=y=69, 2(j+y)=276 is derived, which makes 4,5,6,7 possible for the tens digit. Therefore, the answer is 4.
<result>C</result>
If the tens digit of positive integers j, y are 6, how many values of the tens digit of 2(j+y) can be there?