CREATE TABLE table_74534 ("Rider" TEXT, "Bike" TEXT, "Laps" FLOAT, "Time" TEXT, "Grid" FLOAT)

When the grid number is 10, what is the total number of laps?
SELECT COUNT("Laps") FROM table_74534 WHERE "Grid" = '10'
SELECT COUNT("Laps") FROM "table_74534" WHERE "Grid" = '10'