  In this paper we consider the flat FRW cosmology with a scalar field coupled
with the metric along with generalized Chaplygin gas and perfect fluid
comprising the matter sector. We use the Schutz's formalism to deal with the
generalized Chaplygin gas sector. The full theory is then quantized canonically
using the Wheeler-DeWitt Hamiltonian formalism. We then solve the WD equation
with appropriate boundary conditions. Then by defining a proper completeness
relation for the self-adjointness of the WD equation we arrive at the wave
packet for the universe. It is observed that the peak in the probability
density gets affected due to both fluids in the matter sector, namely, the
Chaplygin gas and perfect fluid.
