Study the graph which shows the daily wages (in ₹ ) with number of workers and answer the question that follows.

If the ratio of the total number of workers whose daily wages are less than ₹450 to the total number of workers whose daily wages are ₹ 600 or above is a : b, then what is the difference between b and a?

2

Total number of workers whose daily wages are less than ₹450 : Total number of workers whose daily wages are ₹ 600 or above

(30)  :  (55 + 35)

30    :       90

 1     :        3

ATQ ,

a : b = 1 : 3

Now , ( b - a ) = 3 - 1 = 2