Right triangle $xyz$ has legs of length $xy = 12$ and $yz = 6$. Point $d$ is chosen at random within the triangle $xyz$. What is the probability that the area of triangle $xyd$ is at most $12$?.

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!