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?
In a relay race, there are five teams, A, B, C, D and E.
What is the porbability
(i) that A, B, C finish first, second and third respectively?
(ii) that A, B and C are first three to finish (in any order)?
Letters of the word ‘EDUCATION’ are re-arranged. Find the probability that the vowels are always together.
Also, find the probability that the vowels are not all together.
Solution not provided.
Ans. (i) No: P(A)>1 (ii) Yes (iii) Yes
(iv) No: P(A)<0 (v) Yes (vi) No: P(A) < 0