Remaining Time 1 hour 43 minutes 12 seoonds v Question Compl

Remaining Time: 1 hour, 43 minutes, 12 seoonds. v Question Completion Status: > a) Moving to another question wil save this response. Question 9 of 10 Question 9 2 points Save Ans If tubing averages 20 defects per 100 meters, what is the probability of finding exactly 2 defects in a randomly chosen 10-meter piece of tubing? 0.2707 O 0.1353 0.1804 004000 Moving to another question wil save this response. Question 9 of 10 > 10 FS

Solution

Note that the probability of x successes out of n trials is          
          
P(x) = u^x e^(-u) / x!          
          
where          
          
u = the mean number of successes = (20 defects/100 m)*(10 m)

u =   2 defects per 10 m      
          
x = the number of successes =    2      
          
Thus, the probability is          
          
P (    2   ) =    0.270670566 [ANSWER]