Getting at least one head when tossing nine fair coins

Explanation:

Let A represent "getting at least one head in 9 tosses"

Then   is "getting no heads in 9 tosses"

P(A) = 1 - P(Â)

 only occurs when all tosses are tails (TTT TTT TTT), so there is only one option of getting no heads.

There are a total of 2⁹ possible outcomes.

So, P(A) = 1 -

             =   -

            =  

             =

whats the

step-by-step explanation:

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