In a musical chair game the person playing the music has been advised to stop playing the music at any time within 2min after she starts playing what is probability that music will stop within the first half minute after starting
Pls explain in easy way i cant understand
Jennydsilva:
Look,, P(E)= outcomes favourable to E /total no. Of all possible outcomes
thus,, outcomes favourable are = 1/2 an hour=30 mins
and total outcomes=2mins=120sec
sorry,, it must1/2min=30 se
sec
thenP(E)=30/120=1/4
hope u understood.
Answers
Answered by
17
29/119 is the answer......... .
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Answered by
55
Given that The music will stop within 2 minutes = 120 seconds
So the music should stop from 1 second to 119 seconds.
Half a minute = 30 seconds
Less than half a minute means from 1 second to 29 seconds.
Probability of stopping the music within half minute = 29/119
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So the music should stop from 1 second to 119 seconds.
Half a minute = 30 seconds
Less than half a minute means from 1 second to 29 seconds.
Probability of stopping the music within half minute = 29/119
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☺☺☺ Hope this Helps ☺☺☺
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Actually the correct answer,, is 1/4 not the one u did..
U read the question,, clearly,, it is written,, that at any time it can stop the music.. so how u take 119 minutes
It's not too complicated.. as u did!!
No Bcoz u cannot stop in the last second and in ques it is given that he need to stop the clock within 2 min so the 120th sec cannot be counted also the 30th sec cannot be counted. Hope u understand
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