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  • If two fair coins are flipped and at least one of the outcomes is known to be a head. What is the probability that both outcomes are heads?  Option:

If two fair coins are flipped and at least one of the outcomes is known to be a head. What is the probability that both outcomes are heads?
 

Option: 1

\frac{1}{3}
 


Option: 2

\frac{1}{4}
 


Option: 3

\frac{1}{2}
 


Option: 4

\frac{2}{3}


Answers (1)

best_answer

\because It is given that at least one of the outcome is head

So sample space for this question=\{(\mathrm{HH}),(\mathrm{HT}), (\mathrm{TH})\rangle=3

Favourable case =\{(\mathrm{HH})\}=1

Hence,the requried probability=\frac{1}{3}

Posted by

Sanket Gandhi

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