Solution not provided.
Ans.Â
Arin has to visit at random three of his friends A, B and C over a week-end. What is the probability that he visits:
(a) B before C Â Â Â Â Â Â Â Â (b) B before C and C before A
(c) C first            (d) A just before B
(e) A either first or last?
Solution not provided.
Ans. (a)Â Â Â Â Â Â Â Â Â Â (b)Â
(c)Â Â Â Â Â Â Â Â Â Â Â Â Â Â (d)Â Â Â Â Â Â Â Â (e)Â
Solution not provided.
Ans. (i)Â Â Â Â Â Â Â Â Â Â Â Â Â Â (ii) 0.50 Â Â Â Â Â Â Â Â (iii) 0.15
A die is rolled thrice. What the probability of:
(a)Â not getting a six each time?
(b)Â getting the same number each time?
Solution not provided.
Ans. (a)Â Â Â Â Â (b)Â