Summary:
Letter Grade Equiv.:
0.000000 <= x < 0.340000 is a F
0.340000 <= x < 0.540000 is a D
0.540000 <= x < 0.740000 is a C
0.740000 <= x < 0.940000 is a B
0.940000 <= x is an A
Number of people of each letter grade:
F: 1
D: 4
C: 2
B: 2
A: 8
Number of correct and wrong answers for each questions:
Q1: C=14 W=3
Q2: C=9 W=8
Q3: C=15 W=2
Q4: C=14 W=3
Q5: C=11 W=6
Q6: C=12 W=5
Q7: C=17 W=0
Q8: C=15 W=2
Q9: C=8 W=9
Q10: C=10 W=7
Q11: C=4 W=13
Q12: C=12 W=5