The expectation of getting correct option out of total choice of 5 question.
Probability is the ratio of number of favorable outcomes to the total number of outcomes.It can not be more than 1.
we have five question each of them has four choice, two out of them are correct.
Number of correct choice in one question = 2
Total number of choice in a question = 4
probability to get correct option of one question = 2/4 = 0.5.
Then the probability of 5 question = 5(0.5) = 2.5
Thus, the expectation of correct choice is 2.5.
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