IDNLearn.com: Where your questions are met with thoughtful and precise answers. Whether it's a simple query or a complex problem, our community has the answers you need.

The probability density function of x, the lifetime of a certain type of device (measured in months),
is given by
f(x)=(0 if x ≤ 25)
((25)/(x²) if x > 25)
Find the following:
P(x>38)=