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December 21, 2014

December 21, 2014

Posted by **max** on Saturday, September 17, 2011 at 12:44pm.

whats the probility at least 1 does not use a computer

whats the probility that all 5 use a computer

- statistics -
**Kaur**, Thursday, September 13, 2012 at 12:00ama) the probability that at least 1 doesnt use a computer at work

Because the question asks for at least 1 that doesn't we have to do the opposite complement.

P(E)=1-P(complement)

Probablity of not using computer(NUC)=1 - Probability of using computer P(NUC)= 1-P(UC)

P(UC)= 0.72

P(using computer 5 times)=(0.72)(0.72)(0.72)(0.72)(0.72) or (0.72)^5=0.19349

P(NUC)= 1-(0.72)^5= 0.807

b) The probability that all 5 use a computer in their jobs

P(C)=P(C*C*C*C*C)=(0.75)(0.75)(0.75)(0.75)(0.75)=(0.75)^5=.194

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