Lids R.
asked • 05/03/19A true-false test contains 18 questions. If you randomly guess on each question, what is the probability that you will have a score of 100%?
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1 Expert Answer
Probability of success on each question is p=0.5
There are 18 questions, so 0.5 x 0.5 x 0.5 x0.5 ...
P(18 correct) = (0.50)^18 = 0.00003814
Long answer involving Bernoulli trials is in the vid !
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Aaron S.
Assuming you have a 50% chance to answer the 1 question correctly, you have a 1 in 2 chance (1/2). Multiply 2 chances by 18 and you get 36. A 1 in 36 chance of getting every question correct.05/03/19