CREATE TABLE table_37123 ("S No" FLOAT, "Opponent" CLOB, "Venue" CLOB, "Date" CLOB, "Match Performance" CLOB)

what is the number of people in sri lanka
SELECT AVG("S No") FROM table_37123 WHERE "Opponent" = 'sri lanka'
SELECT AVG("S No") FROM "table_37123" WHERE "Opponent" = 'sri lanka'