0 votes 0 votes Let $X_{1},\:X_{2},\:X_{3}$ and $X_{4}$ be independent normal random variable with zero mean and unit variance. The probability that $X_{4}$ is the smallest among the four is ________. Probability and Statistics gate2018-ec numerical-answers probability-and-statistics probability random-variable variance + – gatecse asked Feb 19, 2018 retagged Mar 3, 2021 by Lakshman Bhaiya gatecse 1.6k points 143 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.