How many group of 6 boys can be formed from children given below?
how is this c :0 instead of a:2
Vijay walks 10 kilometres towards North. From there, he walks 6 kilometres towards South. Then, he walks 3 kilometres towards East. How far and in which direction is he with reference to his starting point?
A5 kilometres West
B5 kilometres North-East
C7 kilometres East
D7 kilometres West