## Question

###### (2514pts] For the first five files, what is the chance that two or more are highly...

(2514pts] For the first five files, what is the chance that two or more are highly complex? at least (A) 0.1550 (B) 0.1633 (C) 0.1776 Questions (19)- (23): A manager has many files to be reviewed by analysts. From experience, the manger knows that: (D) 0.1881 1/3 of the files are trivial and require 1 hour each (E.1962 1/2 of the files are standard and require 4 hours each 1/6 of the files are highly complex and require 16 hours each

## Answers

here this is binomial with parameter n=5 and p=1/6P(X>=2 )=1-P(X<=1) =1-(P(X=0)+P(X=1) =1-((5C0)*(1/6)

^{0}(5/6)^{5}+ (5C1)*(1/6)^{1}(5/6)^{4}) =1-0.4019-0.4019 =0.1962option E is correct

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