1 votes 1 votes A fair coin is tossed $n$ times. The probability that the difference between the number of heads and tails is $(n-3)$ is $2^{-n}$ $0$ $^{n}C_{n-3}2^{-n}$ $2^{-n+3}$ Probability & Statistics gate2014-ee-1 probability-and-statistics probability coins + – makhdoom ghaya asked Feb 11, 2017 • retagged Mar 8, 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.