Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. basic math
  3. a student is given 20 multiple choice questions. e

A student is given 20 multiple choice questions. Each multiple choice question has 4 options &...

50.1K

Verified Solution

Question

Basic Math

A student is given 20 multiple choice questions. Each multiplechoice question has 4 options & only one correct answer. Thestudent answers all the questions in a random manner.

a) What is the probability the student scores 80% or above?

b) What is the probability the student scores 50% or above?

Answer & Explanation Solved by verified expert
3.8 Ratings (375 Votes)
Solution Backup Theory Implication of random selection One item is picked selected at random from n items each of n items has equal chance of being selected and hence Pa particular item is selected 1n 1 If X Bn    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Finance
1.2K views

You just purchased an annuity that will pay you $24,000 a year for 25 years,  starting today....

Medical Sciences
1.2K views

Bill S. is a longtime patient in your practice and has been in and out of...

Physics
1.2K views

A measuring cylinder made of glass has a volume of 200 mL when measured at 20°C....

General Management
1.2K views

EMPLOYEE HEALTH AND SAFETY IN THE ORGANIZATION Organization officials have a legal and moral responsibility to ensure that...

Biology
1.2K views

In Section 10 of Civil Disobedience, Thoreau stresses the importance of the transcendentalist Ideal of...

Biology
1.2K views

A fascinating discovery is that the oral contraceptives will also prevent HIV infection True Falco

Physics
1.2K views

The potential at a point in space due to a surrounding charge distribution is V...

Physics
1.2K views

Case 2 Equilibrium of a current carrying conductor When a finite length current carrying wire...

Basic Math
1.2K views

Write ?-12 in simplest radical form.

Calculus
1.2K views

4 15 cos x y if sin x 54 5 COS X sin y and...

Accounting
1.2K views

Sarah (53) is unmarried, and her two daughters, Beth (22) and Carol (19), lived with...

Finance
1.2K views

Sources of risk to investors in fixed rate coupon bonds issued by corporations include 1....