If a denotes the no. of permutation of x + 2 things taken all at a time, b the no. of permutation of x things taken 11 at a time and c the no. of permutation of x-11 things taken all at a time such that a = 182 bc then the value of x is _______
(a) 15
(b) 12
(c) 10
(d) 18
