Leaving aside parameter settings re raw+jpg ...... the easiest way to handle is to use the Library Filter Tool in Grid Mode.
Use the "\" to toggle on and off the Filter Tool then .
1. Select the metadata option
2. Select "File Type" for one of the columns.
Assuming all other filters (eg rating, colour, flag, etc) are off, this will give you a summary of all the file types present.
Click on Raw if you just want to see the raw files.
Click on Jpg if you want to see the jpgs (or move or delete or whatever other action you may wish to take)