RRB Group-D 3 Oct 2018-shift -2
Instructions
For the following questions answer them individually
Question 21
If $$G$$ is the G.M. of the product of $$r$$ sets of observations with geometric means $$G_1,G_2,G_3,.....G_r$$ respectively, then find the value of $$G$$?
Question 25
In the Modem Periodic Table, which group has a completely filled valence shell and chemically inactive elements?
Question 26
The speed of a boat in still water is 12 km/h. If the boat covers a distance of 38 km upstream in 4 hours; then the speed of the stream (in km/h) is:
