Answer: the last option. A binomial experiment is an experiment with only two possible outcomes.
In the first option, there is three possible outcomes (i.e. A, B, C) In the second option, there is four poissible outcomes (i.e. ace, king, queen, jack) The third option has six possible outcomes (i.e. six faces of a die) In the last option, there are two possible outcomes (i.e. '2 number cubes')
Your answer would be 36,000 because he gets 3000 every month and every month for a year he would get your answer which would be 3000×12 which equals 36,000