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 -

             =   -

            =  

             =

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

570, the answer is 570, hope it