Number of Heads | Required probability | |
(i) | 0 | P |
(ii) | 1 | Q |
(iii) | 2 | R |
A) \[\frac{1}{2},\frac{1}{4},\frac{1}{4}\]
B) \[\frac{1}{4},\frac{1}{4},\frac{1}{2}\]
C) \[\frac{1}{4},\frac{1}{2},\frac{1}{4}\]
D) \[\frac{1}{2},\frac{1}{2},\frac{1}{4}\]
Correct Answer: C
Solution :
Total outcomes ={HH, TT, HT, TH} i.e. 4 in number (i) Favourable outcomes when there is no head ={TT}i.e., 1 in number. Number of favourable outcomes = 1 Required probability (ii) Favourable outcomes when there is 1 head = {HT, TH} i.e., 2 in number Number of favourable outcomes = 2 Required probability (iii) Favourable outcomes when there are 2 heads ={HH} i.e., 1 in number. Number of favourable outcomes = 1 Required probabilityYou need to login to perform this action.
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