15. A class consists of 8 sophomores and 4 juniors. Two students are selected at random to form a com- mittee. Find the expected number of juniors on this committee. (A) 1/3 (B) 2/3 (C) 1/2 (D) 0 (E) 1 (F) none of the above

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Sixta KovacekLv2

24 Oct 2018

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23. A survey of IU students reveals that 10% of the fresh- men, 15% of the sophomores, 60% of the juniors, and 85% of the seniors like Finite Math. Given that 30% of all students are freshmen, 30% are sophomores, 20% are juniors, and 20% are seniors, what percent age of the student population like Finite Math? (a) .635 (b) .535 (c) .465 (d) .365 (e) 235 (f) none of the above

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15. A class consists of 8 sophomores and 4 juniors. Two students are selected at random to form a com- mittee. Find the expected number of juniors on this committee. (A) 1/3 (B) 2/3 (C) 1/2 (D) 0 (E) 1 (F) none of the above

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