X AND Y ARE TWO PEOPLE PLAYING A GAME IN WHICH ONE WHO FIRST DRAWS THE WHITE BALL FROM A JAR CONTAINING A WHITE AND B BLACK BALLS WINS THE GAME.THEY REPLACE THE BALL AFTER TAKING IT OUT OF THE JAR.IF THE PROBABILITY THAT X WINS THE GAME IS THRICE THEN THAN THAT OF Y , THEN FIND THE RATIO OF A AND B............. ANS = 1/2