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Engineering Mathematics
Conditional Probability
A fair coin i...
Question
A fair coin is tossed N times. The probability that head does not turn up in any of the tosses is
A
(
1
2
)
N
−
1
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B
−
(
1
2
)
N
−
1
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C
(
1
2
)
N
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D
1
−
(
1
2
)
N
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Solution
The correct option is
C
(
1
2
)
N
Req. Prob = P (All Tail)
= P (TTTT ..... T) (N times)
=
(
1
2
)
N
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