Study the given graph which shows the number of workers with their wages and answer the question that follows.
A = the total number of workers whose daily wages are Rs. 450 or above but less than Rs. 500
B = the total number of workers whose daily wages are Rs. 650 or above
What is the value of A : B?
1
2 ∶ 3
2
4 ∶ 5
3
3 ∶ 2
4
9 ∶ 7