The chance would be 4 / 9. The ratio is set up as (amount available to select (apple) / total amount of fruit). Hope this helped.
So 2 to the 3rd power is 8 and 2 to the -3 power would be negative 8.Now u multiply 8 and negative 8 and u get -64.So 2 to the to the -32 power should be the answer.hope this can help u!
It is 12 - 2/3 = 18, then solve :)
hope that helps :D