Hello, rbmeee!

A multiple-choice question has 4 options.

Choosing the correct option gives a student 3 marks.

Choosing the wrong answer incurs negative marks.

So if a student chooses an option randomly, his expected score is zero.

The penalty for a wrong answer is -1.

Suppose the student has successfully eliminated 2 incorrect options.

His expected score, if he chooses randomly among the remaining option, is:

. . (a) 1 . . (b) 1.5 . . (c) 0 . . (d) 3

. .