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A coin is flipped seven times. If the probability that it comes up head at least 4 times in a row is
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a
5/23
b
5/32
c
5/30
d
5/27
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Correct option is B
Let, E: head comes at least 4 times in a rowPossible outcomes areHHHH×××THHHH×××THHHH×××THHHH (where x means F or T)∴ P(E)=116+332=532Similar Questions
The odd against an event are 5 to 2 and the odds in favour of another disjoint event are 3 to 5. Then the probability that atleast one of the events will happen is
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