The table shows the results of a survey that asked 2850 people whether they were involved in any type of charity work. A person is selected at random from the sample. Find the probability of each event.

(a) The person is frequently or occasionally involved in charity work.
(b) The person is female or not involved in charity work at all.
(c) The person is male or frequently involved in charity work.
(d) The person is female or not frequently involved in charity work.

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Male Female Total Frequently Occasionally Not at all Total 795 1472 1378 1536 2850 221 207 428 456 430 886 741