JEE Advance - Mathematics (1998 - No. 32)

If $$\,\left| {\matrix{ {6i} & { - 3i} & 1 \cr 4 & {3i} & { - 1} \cr {20} & 3 & i \cr } } \right| = x + iy$$ , then

x = 3, y = 2

x = 1, y = 3