1 1 vote A surprise quiz contains three multiple choice questions; question $1$ has $3$ suggested answers, question $2$ has four, and question $3$ has two. A completely unprepared student decides to choose the answers at random. If $X$ is the number of questions the student answers correctly, the expected number of correct answers is $15 / 12$ $7 / 12$ $13 / 12$ $18 / 12$ None of the above Probability and Statistics tifr2013 probability-and-statistics random-variable + – admin 304 views answer comment Share Follow Add Sync Questions Print 0 reply Please log in or register to add a comment.
