If the arithmetic mean of seventy-five numbers us calculated, it is 35. If each number is increased by 5, then mean of n…

The average age of 30 students of a class is 14 years 4 months. After admission of 5 new students in the class the avera…

19 people went to a hotel for combine dinner party 13 of them spent Rs. 79 each on their dinner and rest spent 4 more th…

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new averag…

After replacing an old member by a new member, it was found that the average age of five members of a club is the same a…

In an examination, a pupil’s average mark was 63 per paper. If he had obtained 20 more marks for his Geography pap…

In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only …

The average expenditure of a man for the first five months Rs. 1200 and for the next seven months is Rs. 1300. If he sav…