Exactly 120 tickets were sold for a concert. The tickets cost \$12 each for adults, \$10 each for seniors, and \$6 each for children. The number of adult tickets sold was equal to the number of child tickets sold. Given that the total revenue from the ticket sales was \$1100, the number of senior tickets sold was
Answer Choices
A. 110
B. 20
C. 40
D. 2
E. 18