Buy Plenty, a supermarket chain, had successfully implemented an in store promotional campaign based on video messages dashed on a large screen. The purpose of the campaign was to motivate customers to purchase products which they had not planned to buy before they entered to store. The sales manager of Build-It Inc., a chain of do-it-yourself hardware stores, saw the campaign and plans to introduce it in Build-It locations.
The average monthly salary of a staff of 9 persons is Rs. 2450. One number of the staff whose monthly salary is Rs. 2650 is transferred. Find the average salary of the remaining 8 persons of the staff.
The ratio of the age of a man and his wife is 4 : 3. After 4 years, this ratio will be 9 : 7. If at the time of the marriage, the ratio was 5 : 3, then how many years ago they were married?