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 ?

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?

On her vacations Veena visits cities A,B C and D in random order . What is the probability that she visits A 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 : A 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: A 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: a. A before B? b. A before B and B before C? c. A first and B last? d. A either first or second? e. A just 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

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 and B before C ?

On her vacations Veena visits four Cities (A, B,C and D) in a random order. What is the probability that she visits : A first and B last ?

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

Seven white balls and three black balls are randomly placed in a row. The probability that no two black balls are placed adjacently equals a. 1//2 b. 7//15 c. 2//15 d. 1/3