The probability of getting more than 5 questions right in the quiz is
0.00011445.
Given, the probability of guessing right on a 4-option multiple choice item is 1/4 or 0.25.
A quiz contains 10 questions.
we have to find the probability of getting more than 5 right.
Required Probability = P(X = 6) + P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10)
Required Probability = (1/4)^6(3/4)^4 + (1/4)^7(3/4)^3 + (1/4)^8(3/4)^2 + (1/4)^9(3/4)^1 + (1/4)^10
Required Probability = 0.000077 + 0.000025 + 0.0000086 + 0.0000029 + 0.00000095
Required Probability = 0.00011445
Hence, the probability of getting more than 5 questions right in the quiz is
0.00011445.
Learn more about Probability here https://brainly.com/question/27745646
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