Hi everyone! I got another problem I need help on over probability. No links or you will be reported!!! Please help me solve this. Where I'm going wrong and an explanation would be very helpful as well.

problem: The data in the following table shows the outcomes of guilty and not-gulity pleas in 1055 criminal court cases.

Sent to prison:
Guilty plea: 399
Not-gulity plea: 59

Not sent to prison:

Guilty plea: 567
Not-gulity plea: 29

B..What is the probability that a randomly selected defendent either pled not guilty or was sent to prison? (round to three decimal places as needed.)
​