Numerical Appli...

The mean of a sample is:

Arithmetic mean of $$2$$ and $$8$$ is

The monthly average expenditure of a family with $$4$$ members is Rs.$$2,800$$. Find the monthly average expenditure of a family with only $$3$$ members.

The basic unit of speed is:

10 men can finish the construction of a hut in 8 days.How many men are needed to finish the same in half day?

It takes 8 people working at equal rates to finish a work in 96 days. How long 6 workers take for the same work?

The Bubna dam has four inlets.Through the first three inlets,the dam can be filled in 12 minutes; through the second, the third and the fourth inlet,it can be filled in 15 minutes; and through the first and the first inlet, in 20 minutes.How much time will take all the four inlets to fill up the dam?

Two taps 'A' and 'B' can fill a water reservoir in 8 and 6 hours respectively, A third tap 'C' can empty the tank completely in 24 hours.How long would it take to fill the empty tank when all the taps are open?

A tank can be filled up by two pipes A and B in $$2$$ hours and $$3$$ hours respectively.A third pipe C can empty the full tank in $$6$$ hours.If all the taps can be turned on at the same time, the tank will be full in 

If the seventh day of a month is three days earlier than Fridays, what day will it be on the nineteenth day of the month?