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A coin is tossed three times. Find the probability of getting at least 2 heads |
Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :A coin is tossed three <a href="https://interviewquestions.tuteehub.com/tag/times-1420471" style="font-weight:bold;" target="_blank" title="Click to know more about TIMES">TIMES</a>. `S={HHH,HT T, HTH,THH,T TH, THT,HHT,T T T}`<br/> `|S|=8`<br/><a href="https://interviewquestions.tuteehub.com/tag/let-11597" style="font-weight:bold;" target="_blank" title="Click to know more about LET">LET</a> C be the event of <a href="https://interviewquestions.tuteehub.com/tag/getting-2670847" style="font-weight:bold;" target="_blank" title="Click to know more about GETTING">GETTING</a> at least 2 <a href="https://interviewquestions.tuteehub.com/tag/heads-1016558" style="font-weight:bold;" target="_blank" title="Click to know more about HEADS">HEADS</a><br/>`thereforeC={HTH,THH,HHT,HHH}` <br/> `implies |C|=4`<br/>`therefore P(C)=|C|/|S|=4/8=1/2`</body></html> | |