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3 July, 05:32

Students at University X must have one of four class ranks - freshman, sophomore, junior, or senior. At University X, 35% of the students are freshman and 30% are sophomores. If a University X student is selected at random, the probability that he or she is either a junior or senior isA. 0.35B. 0.65C. 0.70D. 0.895

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  1. 3 July, 05:56
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    A. 0.35

    Step-by-step explanation:

    Given that there are four class ranks - freshman, sophomore, junior, or senior

    Freshman = 35% = 0.35

    Sophomore = 30% = 0.3

    Junior or senior = 100% - 35% - 30%

    = 1 - 0.35 - 0.30

    = 0.35

    The probability that a student selected at random is either a junior or senior is 0.35.
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