Total number of students in a class is 95. if the total number of girls in the class is 45 then the ratio of the total number. If boys to total number girls is?

A) 9 : 10

B) 7 : 8

C) 10 : 9

D) 9 : 11

Let the total number of boys in the class be x.
 According to the question,
x + 45 = 95
x = 95 – 45 = 50
 The required ratio of total number of boys to total number of girls  = 50:45 = 10:9