1. Select the group of rows you want to count by clicking on the first row and dragging down to the last row you want to select.
2. Hold down the CTRL key and select additional groups of rows by clicking on the first row of each group and dragging down to the last row of each group.
3. Look at the bottom right corner of the Excel window. You should see a count of the number of rows you have selected.

Alternatively, you can also look at the Name Box, which is located to the left of the formula bar. It will display the range of cells you have selected, including the number of rows and columns.