Bruce becomes very sad when he realises that
Harvey is now killing people based on the
outcome of a coin toss. He also knows that
Harvey kills someone only when he
remembers Rachel while tossing the coin.
Harvey tosses the coin finite number of times
and lists the outcomes. In the list if Tails
comes three times in a row, He remebers
Rachel and kills the other person.
Bruce is sad but wants to focus on positives.
so he thinks about the number of ways when
the other person is not killed for given number
of tosses. As he is unable to compute desired
number he asks you to do so.
Answers
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The correct number is 7/8
Explanation:
When we toss a coin, the probability of getting a tail is 1/2
If a coin is tossed three times then the possibility of getting three tails in line is
(1/2)x(1/2)x(1/2) = 1/8
Thus, the probability of not getting three tails in line is = 1-(1/8) = 7/8
So , there are 7/8 chances that the other person will not get killed
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