Question
The first four moments of a distribution about the
origin are -1.5,17,-30 and 108. The third moment about the mean is:Solution
The correct answer is A
Pipes A, B, and C can fill a tank in 10 hours, 5 hours, and 20 hours respectively. If the efficiencies of pipes A and B are each reduced by 50% of their...
Pipe ‘A’ and pipe ‘B’, together can fill 20% of a tank in 6 hours while pipe ‘C’ takes 35 hours to empty it. ...
- Pipes ‘X’ and ‘Y’ alone can fill a tank in 12 minutes and 18 minutes, respectively, while pipe ‘Z’ can empty the same tank in 36 minutes. If al...
If a tank can be filled by a tap in 10 hours, but due to an outlet, it actually takes 5 hours longer to fill the tank, find the duration in which the o...
Pipe A can fill a tank in 45 minutes while pipe B can fill it in ____ minutes. There’s a leak in the tank which can empty it in _____minutes. When bot...
If a tank can be filled by a tap in 16 hours, but due to an outlet, it actually takes 4 hours longer to fill the tank, find the duration in which the ou...
An inlet pipe can fill an empty tank in 18 minutes whereas an outlet pipe can empty the fully filled tank in 27 minutes. Find the time taken by both the...
P, Q and R three pipes connected to a tank. P and Q together fill the tank in 30 hours, Q and R together fill the tank in 40 hours. P and R together fil...
Pipe ‘A’ takes 40 minutes to fill a tank. Pipe ‘B’ takes 50 minutes to empty the same tank. If pipe ‘B’ is opened 21...
Tap A is 50% more efficient than tap B. Both the taps together can fill the tank in 9 hours. Find the time taken by tap C, which is 25% more efficient ...
