A fair coin is tossed 7 times. Find the probability that the head appears in the seventh trial for the fourth time.
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Favourable outcomes:- 2^4
Possible outcomes:- 2^7
Probability =2^4/2^7
=1/2^3
=1/8
Possible outcomes:- 2^7
Probability =2^4/2^7
=1/2^3
=1/8
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