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If a coin is tossed n times, then find t...

If a coin is tossed n times, then find the probability that the head appears odd number of times.

A

`(2)/(9)`

B

`(S^(9)-1)/(2(3^(9)))`

C

`(4)/(9)`

D

`(3^(9)+1)/(2(3^(9)))`.

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