0 votes 0 votes Candidates were asked to come to an interview with $3$ pens each. Black, blue, green and red were the permitted pen colours that the candidate could bring. The probability that a candidate comes with all $3$ pens having the same colour is _________. Probability & Statistics gate2016-ee-1 probability-and-statistics probability conditional-probability numerical-answers + – makhdoom ghaya asked Jan 29, 2017 • retagged Mar 9, 2021 by Lakshman Bhaiya makhdoom ghaya 9.4k points answer comment Share See all 0 reply Please log in or register to add a comment.