UrbanPro

Take Class 12 Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

There are 4 letters and 4 addressed envelopes. find the probability that all the letters are not dispatched in the right envelope.

Asked by Last Modified  

Follow 1
Answer

Please enter your answer

Maths and Physics teaching For XI, XII, IIT Jee Level , Quant and DI for CAT/GMATE/GRE aspirents

4! (1/2! - 1/3! +1/4! ) = 9
Comments

9
Comments

AARAV Mathematics Classes

1 - (1/4!)=23/24
Comments

9
Comments

Tutor

Let the letter be designated as A,B,C,D and corresponding correct envelopes as 1,2,3,4. FOR EACH LETTER THERE ARE 3 CASES AND FOR EACH CASE 3 POSSIBILITIES. A2 B3 C4 D1 B4 C1 D3 B1 C4 D3 A3 B1 C4 D2 B4 C2 D1 B4 C1 D2 A4 B1 C2 D3 B3 C2 D1 B3 C1 D2 TOTAL...
read more
Let the letter be designated as A,B,C,D and corresponding correct envelopes as 1,2,3,4. FOR EACH LETTER THERE ARE 3 CASES AND FOR EACH CASE 3 POSSIBILITIES. A2 B3 C4 D1 B4 C1 D3 B1 C4 D3 A3 B1 C4 D2 B4 C2 D1 B4 C1 D2 A4 B1 C2 D3 B3 C2 D1 B3 C1 D2 TOTAL NINE CASES Thus probability that none are dispatched in their right envelopes = 9/24 = 3/8 read less
Comments

Mathematics for JEE Mains/Advanced, XI & XII (All Boards)

Derangement Principle
Comments

Enthusiastic and Subject Oriented approach in teaching

The simple direct formula for the envelopes problems is 1/e(for wrong distribution) and (1-1/e) (for atleast 1 enveloep being delivered into right cover)
Comments

Qualified and Experienced Tutor

Question of Dearrangement :)
Comments

View 6 more Answers

Related Lessons

Introduction To Accounting: Part 19: Verifiable Objective Concept
The Verifiable Objective Concept holds that accounting should be free from personal bias. Measurements that are based on verifiable evidences are regarded as objectives. It means all accounting...

Chemistry For Class - 11 Inductive Effect
An inductive effect is an electronic effect due to the polaization of sigma bond within a molecule or ion. This is typically due to an electronegativity difference between the atoms at either end of the...

What is liabiliy?
A liability is an obligation and it is reported on a company's balance sheet. A common example of a liability is accounts payable. Accounts payable arise when a company purchases goods or services on credit...

Election And Democracy
In a developing society like India, elections play their own role in democracy, Their importance becomes greater because there is great illiteracy and simultaneously there are more than 27 crores of voters...

Electrostatics
Sometimes children play with the comb which attracts pieces of paper. We should know about the charges which are at rest in order to understand the reasons behind this phenomenon. Many things like a...

Recommended Articles

Swati is a renowned Hindi tutor with 7 years of experience in teaching. She conducts classes for various students ranging from class 6- class 12 and also BA students. Having pursued her education at Madras University where she did her Masters in Hindi, Swati knows her way around students. She believes that each student...

Read full article >

Sandhya is a proactive educationalist. She conducts classes for CBSE, PUC, ICSE, I.B. and IGCSE. Having a 6-year experience in teaching, she connects with her students and provides tutoring as per their understanding. She mentors her students personally and strives them to achieve their goals with ease. Being an enthusiastic...

Read full article >

Mohammad Wazid is a certified professional tutor for class 11 students. He has 6 years of teaching experience which he couples with an energetic attitude and a vision of making any subject easy for the students. Over the years he has developed skills with a capability of understanding the requirements of the students. This...

Read full article >

Raghunandan is a passionate teacher with a decade of teaching experience. Being a skilled trainer with extensive knowledge, he provides high-quality BTech, Class 10 and Class 12 tuition classes. His methods of teaching with real-time examples makes difficult topics simple to understand. He explains every concept in-detail...

Read full article >

Looking for Class 12 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for Class 12 Tuition Classes?

The best tutors for Class 12 Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take Class 12 Tuition with the Best Tutors

The best Tutors for Class 12 Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more