Geometric Random variables The PMF of a geometric random variable is px(k)=(1-p)k-1p ·E[XX>1]=1+E[X] 2Geometric Random Variables • The PMF of a geometric random variable is 𝑝𝑋 𝑘 = (1 − 𝑝) 𝑘−1𝑝 • 𝐸 𝑋 𝑋 > 1 = 1 + 𝐸[𝑋] 2