Hello, there are three questions and pictures of them in the links If you could solve them that would be awesome, thank you!

1.  1 * = (it will be equal to the sixth root of x cube)

2.  No, the expression X X will be equal to since the powers of      numbers with the same base are added

3. B and D   1/ is the same as 'x'

as mentioned in the last answer, powers of numbers with same base are added. hence, option D will be which will be equal to x

yes. we do proportions in probabilities.