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    There is only 6 possible outcomes so i'm assuming it's 1/6. (A3 A4 B3 B4 C3 C4, as you aleady know 1)
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    So you know that the P (probability) for a 1 is a certain! So she is almost certain to press 1. therefore a 1/1 P.

    Now you have to work out for each row the P she will press each of the buttons. So if I were you just work out each order one at a time. I'll just give you an example to start you off:

    '1' (1/1) AND 'A' (1/3) AND '3' (1/3) OR '1' (1/1) ...........

    When using AND you times.
    when using OR you add.

    Then again... if you at advance study then you might know something about factorials and stuff. Which I have vague knowledge off. So use that if you know.
 
 
 
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