Total 11 persons including Arun went to celebrate a birthday party in a restaurant. Arun spends Rs. 550, but run short of cash. The remaining persons gives 11 rupees each. Then find the average amount spend by them and also the amount Arun has to spend if the average amount paid was same and everyone else would have paid Rs.1 more?
1
70, 520
2
80, 450
3
60, 540
4
70, 540
5
60, 520