SatChunch-Dasa analysis+ Take a T TAT 211-032 MW 2:30 PM-3.20 PM Mohammed Almual

Question

SatChunch-Dasa analysis+ Take a T TAT 211-032 MW 2:30 PM-3.20 PM Mohammed Almualim & 1 4/8/18 10:33 AM Test: Exam #2 Time Remaining: 00:53.23 Submilt Test This Question: 1 pt 12 of 28 (0 complete) This Test: 30 pts On a multiple choice exam, there are ive possible arswes to each of 20 questors. Each queation has only one comect answer A student "A has not studed for the exam and must guess the answer for eachquestion (You may asun erst te gesee independenta, trw) The number of correct guesses that "A"can expect to obtain is OA 2 OB, 4 O c none of these anewers OD. 5 Apr 8 Apr 6 View Al Run the course. Cick to select your anewer View How P18 6

Explanation / Answer

Solution :

The correct option is B . 4

Given that there are n =20 questions in multiple choice exam.

And each question has 5 possible answers.

So probability of getting one correct answer p = 1/5

Number of correct guesses that A expect obtain is = n*p = 20*(1/5) = 4

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