At A, amount of charge, \\\\(q_A\\\\)= \\\\(2.5\ imes{10}^{-7}C\\\\) (Given)At B, amount of charge, \\\\(q_B= -2.5\ imes{10}^{-7}\\\\)Total charge of the system,\\\\(q=q_A+q_B= 2.5 \ imes {10}^{-7} C = 0\\\\)Distance between two charges at points A and B,\\\\( d=15+15=30 cm = 0.3m\\\\)Electric dipole moment of the system is given by,\\\\(p= q_A \ imes d= 2.5 \ imes{10}^{-7}\ imes0.3=7.5\ imes{10}^{-8}cm\\\\) along positive z-axis.Therefore, the electric dipole moment of the system is\\\\( 7.5\ imes {10}^{-8} \\\\) along the positive z-axis.