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A dump of our free Chat sessions, in case it is useful. It excludes white boards used during paid sessions.

tutor3 : Hello Student, May I help you with your Math problems?
student : A machine produces parts of which 0.5% are defective. If a random sample of ten parts contains two or more defective parts, the machine is shut down for repairs.

Find the probability that the machine will be shut down for repairs based on this sampling plan.
tutor3 : Please wait, we are helping other students
student : ok
tutor3 : This is a sample Binomial Problem
N = 10, p = 0.005, q = 1 – p = 0.995
P(x>1) = P(2) + P(3) + … + P(10) = 1 – [P(0) + P(1)] = 0.0011 = 0.11 %
P(0)= 1*0.0050*0.99510 =0.9511
P(1)=10*0.0051*0.9959 =0.0478

student : ok thank you very much, it helps when you write it out so i can see how you got the answer
tutor3 : welcome
tutor3 : i am seeing your problem..its regarding project right?
tutor3 : sorry the last one was not meant for you

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