Answer:
0.6127 = 61.27% probability of guessing 6 or more questions correctly.
Explanation:
For each question, there are only two possible outcomes. Either you guess the correct answer, or you do not. The probability of guessing the correct answer of a question is independent of other questions. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
12 questions:
This means that

True-false:
Two options, one of which is correct. So

Find the probability of guessing 6 or more questions correctly.

In which









0.6127 = 61.27% probability of guessing 6 or more questions correctly.