The following bar chart shows the number of hospital beds in a state in 5 consecutive years.

The number of hospital beds in Y6 will be 20% more than the number of such beds in Y5, and the number of hospital beds in Y7 will be 25% more than the number of such beds in Y6. What is the ratio of the number of hospital beds in Y2 to the number of hospital beds in Y7?

8 : 15

20% = \(\frac{1}{5}\) &  25% = \(\frac{1}{4}\)

Ratio of  ,   Y5  :  Y6 = 5  :  6   &  Y6  :  Y7 =  4  :  5

Overall ,    Y5  :  Y6  : Y7 = 10  :  12  :  15

ATQ , 10R = 800

so , 15R = 1200

Ratio of Y2  :   Y7 = 640  :  1200  =  8 : 15