5% of income of Swati is equal to 15% income of Raju and 10% income of Raju is equal to 20% income of Mohan. If income of Mohan is Rs.2000, then total income of Swati, Raju and Mohan (in rupees) is
5/100 S = 15/100 R
and 10/100 R = 20/100 M
Therefore
S = (15/100 * 100/5)R = 3R
R = (20/100 * 100/10)M = 2M
Now M = 2000
R = 2*2000 = 4000
S = 3*4000 = 12000
12000+4000+2000 = 18000
Option 9)