Question

Suppose a professor has 3 separate lists of questions totaling 120 questions including: List 1: includes 35 “Hard” questions. You have 40% likelihood of answering each hard question correctly List 2: includes 50 “Intermediate” questions. You have 60% likelihood of answering each intermediate question correctly List 3: includes 35 “Easy” questions. You have 80% likelihood of answering each easy question correctly Professor lets you choose either one of the following 5 exams (You take only one of these 5): Exam1: includes 30 randomly selected questions, all from list 1. If you choose this exam you can pass if you score 40% (12 out of 30) or higher in this exam. Exam2: includes 30 randomly selected questions, all from list 2. If you choose this exam you can pass if you score 60% (18 out of 30) or higher in this exam. Exam3: includes 30 randomly selected questions, all from list 3. If you choose this exam you can pass if you score 80% (24 out of 30) or higher in this exam. Exam4: including 30 questions that consist of 7 questions from the list 1, 13 questions from the list 2, and 10 questions from list 3 (all randomly selected). If you choose this exam you can pass if you score 60% (18 out of 30) or higher in this exam. Exam5: includes 30 randomly selected questions from the list of all 120 questions of all 3 lists combined. If you choose this exam you can pass if you score 60% (18 out of 30) or higher in this exam.

Question 1:Find probability of passing each exam i.e. fill out the empty column in the following table based on binomial distribution answers and highlight in the table the exam which you will choose to take. (SOLVE JUST AS A BINOMIAL, NOT TO NORMAL APPROXIMATION!)

P(passing the exam1)
P(passing the exam2)
P(passing the exam3)
P(passing the exam4)
P(passing the exam5)

Answer 1

Answer Suppose a Propessi has 3 sepaate Rsts of list 1 : 40 %hkerhood Lista includes 35 Hand Queshons. You have ech ha answer, of nherme CoYve내 eaS ncu QuestPon comecH Pets yeu choose eh one ofte Pe i exams eam Letx be he rumber osred CorrecH 30 30

umer uesons ansered Correct 30 30 Exom3 Let x be the runer gues品ns 0rsu ered Correutt 30 4 ン0.604

CoeuH Fom ct i expected comec ansers 1*o.yae, correcaswers 18-6 Standard derafónこ2.53 x be the umber oF conre answers Then X -18.6 .53 0.599 exrn .599

we Can answer g Conrect expeced numrestns non 13st- 3- ( Vonone = 6.5 shandard devfaiors a.55 to iromal X be the umber of Correuansuwers then RSS Pass se usn choose to take exam 3 Cas Pnbabty 8s hiet)