How many students are taking the XAT mocks? Will be great if @Cracku can also mention the number of students that have taken the mock in the analysis section!

You can find that out by your percentile and your tentative rank given in the mock analysis easily

For XAT Mock 1, the number of test takers is given at the end of the analysis, for the rest, just use your percentile and consider the test takers of Mock 1 as a baseline to calculate your rank.