#22 22. Consider the same scenario as in #19 and #21, where 20 percent of the widgets come from supplier B.(a) If widgets are selected at random, what is the probability that the first one from supplier B occurs onthe third selection?(b) If widgets are selected at random, what is the probability that at least 3 must be selected until gettingthe first one from supplier B?(c) What is the expected number of widgets that would need to be selected before getting the first onefrom supplier B? A company gets 5% of its widgets from supplier A, 20% from supplier B, 30% from supplier C and 45% fromsupplier D. The percentage of widgets from suppliers A, B, C and D that are defective is 30, 10, 5 and 2,respectively. (By the way, LO 21 and LO 22 will also use this initial set up).

A company gets 5% of its widgets from supplier A, 20% from supplier B, 30% from supplier C and 45%…

Answered: (a) If widgets are selected at random,…

(a) If widgets are selected at random, what is the probability that the first one from supplier B occurs on the third selection?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

#22

22. Consider the same scenario as in #19 and #21, where 20 percent of the widgets come from supplier B.
(a) If widgets are selected at random, what is the probability that the first one from supplier B occurs on
the third selection?
(b) If widgets are selected at random, what is the probability that at least 3 must be selected until getting
the first one from supplier B?
(c) What is the expected number of widgets that would need to be selected before getting the first one
from supplier B?

A company gets 5% of its widgets from supplier A, 20% from supplier B, 30% from supplier C and 45% from
supplier D. The percentage of widgets from suppliers A, B, C and D that are defective is 30, 10, 5 and 2,
respectively. (By the way, LO 21 and LO 22 will also use this initial set up).

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