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Which of the following are accepted without proof in a logical system? check all that apply.

The tile along the edge of a triangular community pool needs to be replaced? ?

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?