Summary:
Letter Grade Equiv.:
0.000000 <= x < 0.125000 is a F
0.125000 <= x < 0.375000 is a D
0.375000 <= x < 0.625000 is a C
0.625000 <= x < 0.875000 is a B
0.875000 <= x is an A
Number of people of each letter grade:
F: 3
D: 5
C: 7
B: 5
A: 1
Number of correct and wrong answers for each questions:
Q1: C=19 W=2
Q2: C=19 W=2
Q3: C=13 W=8
Q4: C=9 W=12
Q5: C=1 W=20
Q6: C=5 W=16
Q7: C=9 W=12
Q8: C=10 W=11
Q9: C=10 W=11
Q10: C=9 W=11
Q11: C=17 W=3
Q12: C=5 W=15