2 votes 2 votes A final exam is a discrete mathematics course consisting of 20 true-false questions, each worth 3 points and 10 multiple choice questions, each worth 4 points. Suppose that the probability that a student gives a correct answer to a true-false question is 0.9 and the probability that student gives a correct answer to a multiple choice question is 0.8. What is student expected score on the final exam___ Probability test-series engineering-mathematics probability expectation + – LRU asked Nov 7, 2021 LRU 556 views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply Yaman Sahu commented Nov 7, 2021 i edited by Yaman Sahu Nov 7, 2021 reply Follow Share Does the answer is 86?? 1 votes 1 votes Chandrabhan Vishwa 1 commented Nov 7, 2021 reply Follow Share we can find expected score 20*3*0.9+10*4*0.8=54+32=86 1 votes 1 votes Please log in or register to add a comment.
Best answer 1 votes 1 votes T/F MCQ Total question : 20 10 Points : 3 4 Correct probability : 0.9 0.8 So, total score if all T/F are correct =20×3=60 total score if all MCQ are correct =10×4=40 Now, excepted score = 60×0.9 + 40×0.8=86 Onika answered Nov 11, 2021 • selected Jan 3, 2022 by LRU Onika comment Share Follow See all 0 reply Please log in or register to add a comment.