Probability Math ???

....................Male ......Female ....Total

Algebra...........21..........13____....34

Geometry.......34 ____..... 26 ___....60

Total............55_____......39____...94

The question is

1,What is the probability that a student is male given that he prefers Algebra?

2,Find the probability of selecting someone who prefers ALgebra and is male.

What is the different betwen 2 question??