Answer:
1. The scoring scheme which has 5 question choices
Probability of giving one correct answer
[tex]=\frac{1}{5}[/tex]
=20%
2. The scoring scheme which has 4 question choices
Probability of giving one correct answer
[tex]=\frac{1}{4}[/tex]
=25%
3. The scoring scheme which has 3 question choices
Probability of giving one correct answer
[tex]=\frac{1}{3}[/tex]
=33.34%
The Scoring scheme which has 3 question choices is most favorable to test taker.
