A businessman has spent 30% of his income on household items, gave 20% of his income to his wife, invested 30% of the remaining with a rate of interest 20%, and rest the amount he saved. What% will be the difference in interest on overall income, if he invests his savings with 20% p.a.?
1
3(9 / 11)%
2
2(7 / 11)%
3
3(7 / 11)%
4
2(9 / 11)%