2. A commercial jet aircraft has four engines.

Jyothi R G

Jyothi R G

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2. A commercial jet aircraft has four engines. Each engine has independent reliability of     92% For safe landing, at least 2 engines of an aircraft need to function       
a. Compute the probability that an aircraft can land safely           
b. If the probability of safe landing must be 98.3%  compute the minimum required  reliability of each engine assuming two engines min out of 4 have to function         
c. If the reliability cannot be improved beyond  92% find the minimum number of engines which are required for safe landing, using probability of b above for safe landing          
d. Which is a better approach to safety? Look at answers to b and c above. Having 2 engines more reliable or increasing the number of engines? Discuss in numbered points bem.     

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