NIMCET 2014 Question Paper with solutions

Consider the values A = 2.0 x ${10}^{30}$ , B = -2.0 x ${10}^{30}$,C = 1.0 × ${10}^{30}$. Assume, that the floating point numbers are represented with 32 bits. What are the values of X and Y, when the following sequence of operations are executed on a computer?
X = A + B
Y = A + C
X = X + C
Y = Y + B