Question

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

Answer 1

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.

Answer 2

i think know you understand

Answer 3

yeah write.. i have some more questions to ask

Answer 4

this answer is not right