A grocer has sale of Rs. 6435, Rs. 6927, Rs, 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months.  How much sale must he have in the sixth month  so that he gets an average sale of Rs. 6500.

A car owner buys petrol at RS. 7.50  Rs. 8  and Rs. 8.50 per litre for three successive years.  What approximately is the average cost per litre of petrol if  he spends Rs. 4000 each year ? 

The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45 .15 kg.  Find the average weight of  all the boys in the class. 

A family consists of grand parents, parents and three grand children.  The  average age the  grand parents is 67 years, that of the parents is 35 years and that of the grand children is 6 years.  What is the average age of the family ? 

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team ?

The average weight of the 35 students of  the A division of class 6 is 32 kilograms.  The average weight of the 40 students of B division is 36 kilograms.  What is the average weight of the two division s altogether ?

Collection on seven days of the first week of April is Rupees 6432, 7250, 9218, 7111, 8540, 4560 and 6700. Find one day’s average.

The middle number among 13 consecutive natural numbers is 31. Find the sum of the 13 numbers ?

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of b and C be 43 kg. Then the weight of B be.

The average age of husband, wife and  their child 3 years ago was 27 years and that of  wife  and the child 5 years ago was 20 years.  The present age of the husband is _____.