On her vacations Veena visits four cities A, B, C and D in a random order. What is the probability that she visits: A before B?      

On her vacations Veena visits four cities (A , B , C a n d 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 be

Four men A,B,C and D, line up in a row. What is the probability that man A is at either end of the row?

Two customers A and B are visiting a particular shop in the same week (Tuesday to Saturday). Each is equally likely to visit the shop on any day as on another day. What is the probability that both will visit the shop on: different days

Two customers A and B are visiting a particular shop in the same week (Tuesday to Saturday). Each is equally likely to visit the shop on any day as on another day. What is the probability that both will visit the shop on: consecutive days?

Two customers A and B are visiting a particular shop in the same week (Tuesday to Saturday). Each is equally likely to visit the shop on any day as on another day. What is the probability that both will visit the shop on: the same day?

In a really race there are give teams, A, B, C, D and E i. What is the probability that A, B, and C finish first, second and third respectively. ii. What is the probability that A, B and C are first three to finish (in any order).

The first twelve letters of the alphabet are written down at random . What is the probability that there are four letters between the A and the B?

A student takes examination in four subjects A, B, C, D. His chances of passing in A are 4/5 , in B are 3/4 , in C are 5/6 and in D are 2/3 . To qualify he must pass in A and atleast in two other subjects. What is the probability that he qualifies ?

Four pool balls - A, B, C, D - are randomly arranged in a striaght line. What is the probability that the order will actually be A, B, C, D ?

Three persons A, B and C speak at a function along with 5 other persons. If the persons speak at random, find the probability that A speaks before B and B speaks before C