They answered the questions as follows:

Student Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Allan C C B D D T F F F F Betty A C D E A F T F F F Carl A B E C B T F T T T Doris C D A E B T F F F F Elmer C C E D A F T F F F Fiona C E A C E F F T T T Gary A B A C E T F F T T Hazel B B D C A T F F F F Irvin E E C C B T T T T T Julia A B C C D F F F T T

- No two students got the same number of correct answers.