I need help on 8 multiple choice questions:

1..A jar contains black marbles and green marbles. Sixty percent of the marbles in the jar are green. A number generator simulates randomly selecting 10 marbles from the jar. The number generator is used 12 times and the number of green marbles in each trial is shown in the dot plot.Which description is correct about the number generator being fair or not?

\f\f\f\f\f