The probability of guessing the correct answer to a certain test questions is `x/(12)` If the probability of not guessing the correct answer to this question is `2/3` then x = (a)2 (b) 3 (c) 4 (d) 6

Explanation

Probability of guessing the correct answer to certain test question =`x/12`


So, probabiiity of not guessing the correct answer=`1-x/12`


But, `1-x/12=2/3`


`x/12=1-2/3=>x=4`