Option A: 11.8%
Explanation:
The total number of question n=10
The probability of getting true is
The probability of getting false is
It is given that the student gets 7 out of 10 questions right, the,
Using binomial distribution formula,
Substituting the values, we get,
Solving, we get,
To find the probability, multiply it by 100, we get,
%
Thus, the correct answer is 11.8%