Mary and Ket are cousins. Mary's present age is 9 times what Ket's age 12 years ago was. When Ket will be 17 years older than Marry's present age, the sum of their ages will be 100. The present ages of Mary and ket, respectively are
A. 27 and 15
B. 36 and 18
C. 18 and 14
D. 30 and 16
E. none of these
A. 27 and 15
B. 36 and 18
C. 18 and 14
D. 30 and 16
E. none of these