question_answer

The probability of guessing the correct answer to a question is \[\frac{x}{2}.\]If the probability of not guessing the correct answer to this question is \[\frac{2}{3},\] then \[x=\_\_\_\_.\]

A)  2                                

B)  3                                

C)  \[\frac{2}{3}\]                         

D)  \[\frac{1}{3}\] 

Correct Answer: C

Solution :

Probability of guessing correct answer Probability of not guessing correct answer  Now, according to question,