get count of rows from different tables

int noOfbooks=0;
int noOfStudents=0;
int noOffaculty = 0;

//Write code here to fetch rows account from database for all three tables.
//You can use separate three queries for fetching data from database or you can create
//stored procedure to get all counts in a single hit.
//After that assign values feteched from database to above variables.

DataTable dt = new DataTable();
DataColumn dc = new DataColumn("NoOfBooks");
dt.Columns.Add(dc);
dc = new DataColumn("NoOfStudents");
dt.Columns.Add(dc);
dc = new DataColumn("NoOfFaculty");
dt.Columns.Add(dc);

DataRow dr = dt.NewRow();
dr["NoOfBooks"] = noOfbooks.ToString();
dr["NoOfStudents"] = noOfStudents.ToString();
dr["NoOfFaculty"] = noOffaculty.ToString();
dt.Rows.Add(dr);

GridView1.DataSource = dt;
GridView1.DataBind();