mber of Rs5 notes = xNumber of RS10 notes = yGiven :Nikhil has Rs 500Number of Rs5 notes = 3 TIMES number of Rs 10To find :Amount of money he has Rs5 notes.Solution :Amount of money Nikhil has as Rs5 = 5× Number of Rs5 notes ➝ Amount of money Nikhil has as Rs5 = 5xAmount of money Nikhil has as Rs10 = 10 × Number of Rs10 notes ➝ Amount of money Nikhil has as Rs10 = 10yTherefore TOTAL amount of money = Amount of money Nikhil has as Rs5 + Amount of money Nikhil has as Rs10➝ Total amount of money = 5x + 10y➝ 5x + 10y = 500 equation 1_______________________________________________Also, according to questionNumber of Rs5 notes = 3× Number of Rs10 notes➝ x = 3y➝ y = x/3 equation 2_______________________________________________On putting VALUE of y from equation 2 into equation 1 we get;_______________________________________________This gives number of Rs5 notes = 60➝ Amount of money Nikhil has as Rs5 = 5x➝ Amount of money Nikhil has as Rs5 = 5×60➝ Amount of money Nikhil has as Rs5 = Rs300_______________________________________________ANSWER :Option 3) Rs 300