Felipe surveyed students at his school. ​​He found that
78
78 students own a cell phone and
57
57 of those students own an MP3 player.
​There are
13
13 students that do not own a cell phone, but own an MP3 player.
​Nine students do not own either device.
​
​A two way table for the above information is given below:

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)