The total number of students in a school is 2140. If the number of girls in the school is 1200, then what is the respective ratio of the total number of boys to the total number of girls in the school ?
a) 26:25
b) 47:60
c) 18:13
d) 31:79

• ratio= (total no of students - total no of girls)/ total no of girls
  = (2140 - 1200)/1200
  = 940/1200
  = 47/60 (b)
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