The table summarizes the opinions of various groups on the issue of oil drilling in national parks.

1. Find the probability that an individual chosen at random is a Republican or favors oil drilling in national parks.
2. Find the probability that an individual chosen at random is a Democrat or opposes oil drilling in national parks.
3. Find the probability that an individual chosen at random is White or opposes oil drilling in national parks.
4. Find the probability that an individual chosen at random is non-White or favors oil drilling in national parks.

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Nonwhites Whites Dems. Opinion Favor Oppose Total Reps. Reps. Dems. Total 300 100 400 25 25 50 100 250 10 190 435 565 1000 350 200