Latest TCS Aptitude Question SOLUTION: A mcq ques has 4 options.choosing correct option a student cn get 3marks. chossing incorrect option incurs negetive marks so dat if a student choose randomly his xpected score will

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A mcq ques has 4 options.choosing correct option a student cn get 3marks.
chossing incorrect option incurs negetive marks so dat if a student choose randomly his xpected score will b 0.suppose a studnt succesfully elminated 2 incorrect option
his xpected score if he choose a option randomly from the remaining option

1)1.00
2)1.50
3)00
4)3

Asked In TCS xyz (12 years ago)

Unsolved Read Solution (3)

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Read Solution (3) :

virendra  (12 years ago)

probability to choose correct answer is 1/4 and he get 3 marks for right answer
probability to choose wrong answer is 3/4 and let he loose x marks for wrong answer.

Then
(1/4)*3+(3/4)*x=0 according to question
then x=-1

After that he eliminated 2 incorrect options
So
probability to choose correct answer is 1/2
and wrong answer is 1/2
So his score={(1/2)*3}+{(1/2)*(-1)}=1

Is this solution Helpfull? Yes (51) | No (3)  

Harsh Gupta  (12 years ago)

In question is given that if randomly selection will take place then ans will be 0(zero).

Is this solution Helpfull? Yes (5) | No (8)  

kaykash  (12 years ago)

answer is 3

Is this solution Helpfull? Yes | No (5)  

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