Let XXX be a random variable with PDF f(x)=2e−2xf(x) = 2e^{-2x}f(x)=2e−2x for x≥0x \ge 0x≥0. What is P(X>1)P(X > 1)P(X>1)?
e−2e^{-2}e−2
1−e−21 - e^{-2}1−e−2
e−1e^{-1}e−1
1−e−11 - e^{-1}1−e−1