# How many times must a man toss a fair coin so that the probability of having at least one head is more than 90%? Option 1) Option 2) Option 3) Option 4)

Binomial Theorem on Probability -

Then

or

-

min value  option

Option 1)

This option is incorrect

Option 2)

This option is incorrect

Option 3)

This option is correct

Option 4)

This option is incorrect

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