3 votes 3 votes Vinod has $1000$ coins. He spreads them on his bed. Initially all of them are facing head. Sachin selects any $57$ coins at random and inverts all of them. Daga repeats this process $12$ times. What is the expected number of head after the process? Probability numerical-answers quantitative-aptitude expectation + – robertSingh asked Oct 4, 2016 robertSingh 269 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.