TV fail

The TV has after 10,000 hours average 35 failures. Determine the probability of TV failure after 400 hours of operation.

Correct result:

p =  75.4 %

Solution:

p1=35/10000=72000=0.0035 p2=1p1=10.0035=0.9965  p=100 (1p2400)=100 (10.9965400)=75.4%p_{1}=35/10000=\dfrac{ 7 }{ 2000 }=0.0035 \ \\ p_{2}=1 - p_{1}=1 - 0.0035=0.9965 \ \\ \ \\ p=100 \cdot \ (1 -p_{2}^{ 400 })=100 \cdot \ (1 -0.9965^{ 400 })=75.4 \%



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