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16 December, 11:23

At a high school, being a senior and being a sophomore are mutually exclusive events. The probability that a randomly selected student is a sophomore is 0.23. The probability that a randomly selected student is a senior is 0.21. What is the probability that a randomly selected student is a sophomore or a senior?

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  1. 16 December, 12:57
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    0.44

    Step-by-step explanation:

    The prob. that a senior or sophomore is selected is 0.23 + 0.21 = 0.44
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