OpenStudy (anonymous):
An examination consists of a large number of question of the multiple choice type, with each question having five possible answers but only one of the five being the correct answer. If a student receives 3 points for each correct answer and-1 point for each incorrect answer and if on each of ten question, his probability of guessing the correct answer is 1/3, what is the probability of obtaining a total positive score on those ten questions
OpenStudy (swamijatin2):
he number of outcomes that are possible for the terms provided divided by the total number of outcomes possible; therefore example to answer the question, there are 5 red marbles out of a total of 15 marbles in the bag. 5/15 = 1/3.
OpenStudy (swamijatin2):
i think know you understand
OpenStudy (anonymous):
yeah write.. i have some more questions to ask
OpenStudy (anonymous):
this answer is not right
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