dolly is watching t.v which has only 4 channels and they are boring. so she changes the channels fter every minute.no.of ways she can change the channels in first 4 minutes so that after 4 minutes she get the oriinal channel back

Question

Arun · Answer

if A,B,C,and D are chennel , and he can change the channel in both side( assume cyclic arrenge ment , becaus he can either increase the channel no or decrease the channel no ) so for after 4th time he will get the original (1st ) channel there is only one way . and now we can see he has two ways to go so total number of ways he can change channel is 2*2*2*2 = 16

Vikas TU · Answer

Dear student If we designate the original channel C1, then Dolly has three choices after the first minute, which we call C2, C3, C4. For each such choice, she has two choices after the second minute, namely the two that she has not yet selected. For each such choice, she also has two choices after the third minute, the channel she has not yet selected or the channel she selected after the first minute. Since Dolly must return to her original channel after the fourth minute, she has 3⋅2⋅2=12 ways to return to the original channel for the first time after the four minutes. Good Luck

Thank you for registering.

Register Now and Win Upto 25% Scholorship for a Full Academic Year !

Enter Your Details

Registration done!

Guest

dolly is watching t.v which has only 4 channels and they are boring. so she changes the channels fter every minute.no.of ways she can change the channels in first 4 minutes so that after 4 minutes she get the oriinal channel back

dolly is watching t.v which has only 4 channels and they are boring. so she changes the channels fter every minute.no.of ways she can change the channels in first 4 minutes so that after 4 minutes she get the oriinal channel back

2 Answers

Think You Can Provide A Better Answer ?

Other Related Questions on Algebra

ASK QUESTION

Answer and earn gift vouchers

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Complete Self Study Package designed by Industry Leading Experts

Live 1-1 coding classes to unleash the Creator in your Child

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Register Now & Win Upto 25% Scholorship

Thank you for registering.

Register Now and Win Upto 25% Scholorship for a Full Academic Year !

Enter Your Details

Registration done!

Guest

IIT JEE Courses

One Year IIT Programme

Two Year IIT Programme

Crash Course

NEET Courses

One Year NEET Programme

Two Year NEET Programme

One to One

School Board

Live Online classes

Class 11 & 12

Class 9 & 10

Class 6, 7 & 8

Test Series

JEE test series

NEET test series

C.B.S.E test series

Complete Self Study Packages

FULL COURSE

For class 12th

For class 11th

dolly is watching t.v which has only 4 channels and they are boring. so she changes the channels fter every minute.no.of ways she can change the channels in first 4 minutes so that after 4 minutes she get the oriinal channel back

dolly is watching t.v which has only 4 channels and they are boring. so she changes the channels fter every minute.no.of ways she can change the channels in first 4 minutes so that after 4 minutes she get the oriinal channel back

2 Answers

Think You Can Provide A Better Answer ?

Other Related Questions on Algebra

ASK QUESTION

Answer and earn gift vouchers

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Complete Self Study Package designed by Industry Leading Experts

Live 1-1 coding classes to unleash the Creator in your Child

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Register Now & Win Upto 25% Scholorship