The histogram shows the weights of students of class X in a school. Let x be the number of students whose weight is less than 50 kg and y be the number of the students whose weight is greater than or equal to 60 kg. What is the value of x : y ?

11 : 13 9 : 13 13 : 9 13 : 11

13 : 9

x = 20 + 45 = 65 y = 40 + 5 = 45 Now ,  x  :  y = 65  :   45                        13   :   9