On her vacations veena visits four cities( A,B,C and D) in a random order.what is the probability that she visits
i)A before B ii) A before B and B before C iii)A first and B last iv)A either first or second v)A just before B.
On her vacations veena visits four cities( A,B,C and D) in a random order.what is the probability that she visits
i)A before B ii) A before B and B before C iii)A first and B last iv)A either first or second v)A just before B.