SOLUTION: Would you pls help me with this problem? There are 52 white keys & 36 black keys on a standard piano. What is the probability that if a person did not look & hit the keyboard twi

Question 624200: Would you pls help me with this problem?
There are 52 white keys & 36 black keys on a standard piano. What is the probability that if a person did not look & hit the keyboard twice that she would first hit a white key & then a black key?
Pls, send me the steps because I want to be able to solve other similar exercises.
(This is the 2nd time that I am submitting this problem without receiving any answer, could anyone help pls.)
Thanks a lot

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

There are 52 white keys & 36 black keys on a standard piano  in all...

person did not look & hit the keyboard twice...

P(White, then Black) =    

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