Mani invested an amount of Rs. M at the rate of 7.5% S.I. per annum and an amount of Rs. N at the rate of 6% S.I. per annum. He received interest of Rs. 5700 at the end of the year. If he interchanged the amounts invested, he would have received an interested of Rs.7200. Then |M – N| =?
1
Rs. 75,000
2
Rs. 80,000
3
Rs. 1,20,000
4
Rs. 1,00,000