I am give probability distribution function f(x)=(e(-x/1000))/1000 of the time to failure of an electronic component in a copier(adsbygoogle = window.adsbygoogle || []).push({});

The question is to determine the number of hours at which 10% of all components have failed.

My solution:

1) PDF was integrated to obtain: f(x)= e(-x/1000)

2) Then, I used e(-x/1000)=0.1 with upper boundary x, and lower boundary is 0 to find x as the number of hours at which all 10% of components have failed. However, entering it in calculator, I couldn't obtain solution. What did I wrong here?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Solving PDF with set boundary values

**Physics Forums | Science Articles, Homework Help, Discussion**