Answer:
Let
required number of trials are n.
Let
x is the number of heads, then x has the binomial distribution with number of
trials = n,
According
to question, P(atleast one head) >
?
(1)
Since
= 12, 2,
3, 4, 5, ?
Therefore
n = 4, 5, 6?? will satisfy (1)
Hence
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