The students in the Science club of Ezhimala G.U.P school conducted a survey on the consumption of electricity in 6 houses.  They found out that the average monthly consumption is 150 unites.  Then the houses started using CFL bulb.  In the survey after one month.  They found that there was a decrease of  180 units in  consumption.  What is the average consumption ?

Average of 20 numbers is zero. Of  them,  at the most, how many may be  greater than zero ? .

The average weight of 8 person’s increases by 2.25 kg when a new person comes in place of one of them weighing 65 kg. What might be weight of the new person ?

John got an average of 25 coconuts from 10 coconut tree from this coconut grove. What can be the number of coconuts he got from each coconut tree ?

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 ?

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 ? 

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.

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 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 ?

In the first  10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs ?