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Unformatted text preview: Name: 0mm was ECEn 370 Quiz 1 Friday, January 13‘ 2012. 1. A lot of 200 widgets contains 10 that are defective. Two chips are selected at random, wihtout replacement, from the lot. a) (2 pts) What is the probability that the first one selected is defective? 7) L Adaptive. m) ~. Kym —_ E; \/ b) (2 pts) What is the probability that the second one selected IS defective given that the first one was defective A '. lqlt Lu'v! firiI-uf ”\H Wolq/ ‘13; ] x f— c) (2 pts) What is the probability that both are defective? (0 z" filo “f? “" '- -l—-" -' .-—— a.» T315 Z‘igoo igqga ' M x/ 1 Lb: 'T’A'BQJ 2. (4 pts) Let A, B; and C be three events in Q. If P(A) = %, P[B) : %, P(C') =§ P(AF‘|B)= % P(AflC) = %; and P (B n C) = 0, find P (A u B u C}. _ ._ fink,” _ WW kw i a A W If; ‘y/% ’ "a I l ' g , w l \ U v1 Pt” Au 8“ - V} + w vs van e “/24 /u ‘ ”/14 "L la \1 Wm“) M (’Weve are A, e g, gq 2% ...
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