Question

25. On her vacations Veena visits four cities A, B, C, D in a random order. What is the
probability that she visits
(i) A before B?
(ii) A before B and B before C?
(111) A first and B last?
(iv) A either first or second ?
(v) A just before B ?​

Answer 1

Answer:

Step-by-step explanation:

1. no of favourable outcomes = 1

  no of total outcomes = 3

probability = 1/3

2. no of favourable outcomes = 2

   no of total outcomes = 2

probability = 1

3. no of favourable outcomes = 2

no of total outcomes = 2

probability = 1

4. no of favourable outcomes = 1

no of total outcomes  = 3

probability= 1/3

5. no of favourable outcomes = 1

no of total outcomes = 3

probability= 1/3