A multiple choice question has 5 options. Choosing the correct option earns the student 1 marks. However choosing the wrong option incurs negative marks so that if a student chooses an option randomly, his expected score is 0. Suppose a student has successfully eliminated 2 incorrect options. His expected score if he chooses randomly among the remaining options is.
Answers:  A) 1/2  B) 1/3  C) 1/4  D) 2/3  E) 4/3
for right ans 1 no is given and for wrong -.25   so 1(1)+4(-.25)=0   now   1(1)+2(-.25)=.5=1/2.   1/2NSWER:1/2
<result>A</result>
A multiple choice question has 5 options. Choosing the correct option earns the student 1 marks. However choosing the wrong option incurs negative marks so that if a student chooses an option randomly, his expected score is 0. Suppose a student has successfully eliminated 2 incorrect options. His expected score if he chooses randomly among the remaining options is.