Question: i need step by step solution only ... Life span of the LED light is min 50000 hrs so probability of getting fail at that

i need step by step solution only ...

Life span of the LED light is min 50000 hrs so probability of getting fail at that point is 0% and the probability of getting fail by 1000000hrs is 100%, Find the normal distribution curve with 3 standard deviation.

(Hint: more sort of finding cumulative degaration of failure starting from 0 to 100%).

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