One student is selected at random from a group of 20 freshmen, 5 sophomores, 10 juniors,...

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One student is selected at random from a group of 20 freshmen, 5 sophomores, 10 juniors,...

One student is selected at random from a group of 20 freshmen, 5 sophomores, 10 juniors, and 15 seniors. Find the probability that the person selected is:

(a) a freshman, (b) not a sophomore, (c) a junior or a senior.

math Statistics-And-Probability

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One student is selected at random from a group of 20 freshmen, 5 sophomores, 10 juniors,...

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A class contains 5 freshmen, 4 sophomores, 8 juniors and 3 seniors. A student is chosen...

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Of students at a particular university: 20% are freshmen 22% are sophomores 23% are juniors 28%...

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One student is selected at random from a group of 20 freshmen, 5 sophomores, 10 juniors,...

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