Origin Ver. and Service Release (Select Help-->About Origin): Operating System: Can anyone please do let me know that how do I calculate individual area in combined peaks?
You can perform multiple peak fitting of your composite peak, and then the report generated by the fitter will provide area (depending on what fitting function you select, you get the relevant parameters).
In version 8.1, plot your data and use the Analysis: Peaks and Baseline: Multi Peak Fit menu item. You can do more detailed fitting from the advanced NLFit tool.