Permutation & Combination | Engineering Aptitude for GATE 2023 Exam | Part 1 | Rakesh Talreja

  Рет қаралды 26,453

BYJU'S Exam Prep GATE & ESE: EE,EC,IN,CS

BYJU'S Exam Prep GATE & ESE: EE,EC,IN,CS

Күн бұрын

Пікірлер: 94
@BYJUSExamPrepGateEseEEECINCS
@BYJUSExamPrepGateEseEEECINCS 2 жыл бұрын
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@BYJUSExamPrepGateEseEEECINCS
@BYJUSExamPrepGateEseEEECINCS 4 жыл бұрын
H.W. ANSWER KEY 1) 110 2) 120 3) 64 4) 2673
@sudeerannepu4875
@sudeerannepu4875 4 жыл бұрын
Sir could you please post that pdf in comment box?
@BelumCharankumar-reddy
@BelumCharankumar-reddy 4 жыл бұрын
@ SVUCE channel
@chaithanyamuppala4978
@chaithanyamuppala4978 4 жыл бұрын
Explain 4 question sir
@095farhatreyaz6
@095farhatreyaz6 3 жыл бұрын
Thanku sir
@mohammedabdulnaseer786
@mohammedabdulnaseer786 4 жыл бұрын
Super Session sir
@KeepLearningAlways
@KeepLearningAlways 3 жыл бұрын
Excellent teaching
@-Rishikesh
@-Rishikesh 4 жыл бұрын
1) 110 2) 6^4 3)64 4)648*3+729 = 2673
@mangeshpathade562
@mangeshpathade562 4 жыл бұрын
bro explain 2nd que
@jagpreetkaur3878
@jagpreetkaur3878 2 жыл бұрын
Pls explain 4th ans
@kalaiarasi8931
@kalaiarasi8931 3 жыл бұрын
Really superb
@yandragopi5775
@yandragopi5775 Жыл бұрын
68
@darklight8235
@darklight8235 4 жыл бұрын
1.110 2.1296 3.24 4.2673
@gateaspirant4582
@gateaspirant4582 3 жыл бұрын
question 3 -> we can make numbers of single-digit, double-digit, triple-digit also.
@darklight8235
@darklight8235 3 жыл бұрын
@@gateaspirant4582 yup got it..thanks.
@yuvarajeswari6194
@yuvarajeswari6194 4 жыл бұрын
Sir, can you post us the correct answers for the homework sums?
@Golukumar-vj6kk
@Golukumar-vj6kk 4 жыл бұрын
Awwwesome 👍👍👍
@095farhatreyaz6
@095farhatreyaz6 3 жыл бұрын
1)100 2)120 3)64
@nayaneetakri2089
@nayaneetakri2089 4 жыл бұрын
1.110 3.64 4.2673
@praveenKumar-lw4zg
@praveenKumar-lw4zg 4 жыл бұрын
Can you pls explain 3 and 4
@mankalakavitha7433
@mankalakavitha7433 4 жыл бұрын
Can you plz tell me third one
@nayaneetakri2089
@nayaneetakri2089 4 жыл бұрын
@@mankalakavitha7433 single digit u can formed is 4 ,so no of 2 digit will be 4p2=12, no of 3 digit nos will be 4p3=24 ,no of 4 digit nos is 4p4=24 .... So total nos is =4+12+24+24=64 .
@nayaneetakri2089
@nayaneetakri2089 4 жыл бұрын
@@praveenKumar-lw4zg( 3) single digit can be formed is 4, so no of 2 digit will be 4p2=12, no of 3 digit nos is 4p3=24, no of 4 digit nos os 4p4=24 . So total nos is 4+12+24+24=64... 4. There are 4 possible cases ryt. 5x9x9x9=729(it is said 5 is used exactly once ) 8x5x9x9=648 8x9x5x9=648 8x9x9x5=648 648+648+648+729=2673
@mankalakavitha7433
@mankalakavitha7433 4 жыл бұрын
@@nayaneetakri2089 tq
@akankshagupta9040
@akankshagupta9040 3 жыл бұрын
Grade up is best in utube lecture
@brijesh.verma1999
@brijesh.verma1999 4 жыл бұрын
1. ---> 110 2. ---> 120 3. ---> 64 4. ---> 2673
@muba5128
@muba5128 4 жыл бұрын
explain second
@brijesh.verma1999
@brijesh.verma1999 4 жыл бұрын
@@muba5128( ground floor + 5 floors) =6 floor office each person on different floor. so, first have 5 choices , second has 4 choices , third has 3 choices and forth has 2 choices = 5*4*3*2 ===> 120
@shreanshudas1104
@shreanshudas1104 4 жыл бұрын
@@brijesh.verma1999 I have one doubt that why are you starting with 5. The total persons are 4 only
@brijesh.verma1999
@brijesh.verma1999 4 жыл бұрын
@@shreanshudas1104 here 5 means that the first person have 5 choice(floors) and 2nd person now have 4 choices left and so on
@shreanshudas1104
@shreanshudas1104 4 жыл бұрын
@@brijesh.verma1999 thanks very much... Just one more thing that what if 2 persons get out on the same floor?
@jithendravarma7279
@jithendravarma7279 4 жыл бұрын
Sir are you going to cover all the topics in gate 2021 syllabus (aptitude)
@BYJUSExamPrepGateEseEEECINCS
@BYJUSExamPrepGateEseEEECINCS 4 жыл бұрын
For complete course Subscribe to Gradeup Super . Please check the links in the video description .
@ramasivasubrahmanyampedire8660
@ramasivasubrahmanyampedire8660 3 жыл бұрын
@@BYJUSExamPrepGateEseEEECINCS How much percentage of syllabus you guys covered in all the aptitude videos(KZbin)..???
@jonesvictor5801
@jonesvictor5801 4 жыл бұрын
Isn't the answer of 3rd question 24 based on the choices (4 x 3 x 2 x 1)?
@shreanshudas1104
@shreanshudas1104 4 жыл бұрын
No! It didn't mention only 4 digit nos. You can form 4digit, 3digit, 2digit and 1digit as well
@jonesvictor5801
@jonesvictor5801 4 жыл бұрын
@@shreanshudas1104 Thanks Man
@MrSiddusivva
@MrSiddusivva 3 жыл бұрын
Sir when you said reputation is not allowed how could be 9×9×8×7.. It should be 9×8×7×6...
@mahi-ho9nc
@mahi-ho9nc 3 жыл бұрын
Sir,in - - - we get 9*10*10 ok ,but why do we need to subtract 999-99?? I can't get this step can you explain me sir..
@vasanthreddy1434
@vasanthreddy1434 3 жыл бұрын
they asked 3 digit no's if 1st choice is 0 then there exists 2 digit nos only so 0-99 are 2 digit so subtracted
@BC-yr6eg
@BC-yr6eg 4 жыл бұрын
👍👍👍👍👍👍👍
@PKJk402
@PKJk402 4 жыл бұрын
Sir please explain hw problems
@nitishchoudhary201
@nitishchoudhary201 4 жыл бұрын
Answer of 4: 1848
@MrSiddusivva
@MrSiddusivva 3 жыл бұрын
Sir in fourth problem How could hundreds place be again 9 ? Can anyone please help me about this
@shreanshudas1104
@shreanshudas1104 4 жыл бұрын
Can anyone please tell how to solve Q2 (lift problem)?
@impressivelyimperfect7374
@impressivelyimperfect7374 2 жыл бұрын
No
@shreanshudas1104
@shreanshudas1104 2 жыл бұрын
@@impressivelyimperfect7374 cool, no need, I am currently in IIT Bombay.
@legendprinceprem6576
@legendprinceprem6576 4 жыл бұрын
Sir, when finding the telephone number.... starting number if we put 0 then it becomes 6 digit number
@shreanshudas1104
@shreanshudas1104 4 жыл бұрын
No telephone nos and passwords can start with 0 as well but when we form 7digit numbers then we cannot take starting as 0
@MrSiddusivva
@MrSiddusivva Жыл бұрын
Sir it was said reparations not allowed na why 9987, instead it can be 9876 also... Please anyone help me with my doubt over here
@saurabhkg5856
@saurabhkg5856 Жыл бұрын
If first digit could also have been 0, then the answer would be 10*9*8*7. (Because from 0 to 9, there are 10 digits). But here since 0 can't be first digit, we take 9*9*8*7.
@MrSiddusivva
@MrSiddusivva 3 жыл бұрын
Sir R comes 5th in the word RAKESH
@hritikgupta460
@hritikgupta460 4 жыл бұрын
1-110 2-1296 3-64 4-2048
@lovelykumari3486
@lovelykumari3486 4 жыл бұрын
How did you got 4th one?
@lovelykumari3486
@lovelykumari3486 4 жыл бұрын
Okay
@lovelykumari3486
@lovelykumari3486 4 жыл бұрын
@NAYANEE TAKRI let's wait for the final answer to be uploaded by gradeup
@lovelykumari3486
@lovelykumari3486 4 жыл бұрын
@@nayaneetakri2089 no I have updated my answer I think I got 2592
@nayaneetakri2089
@nayaneetakri2089 4 жыл бұрын
@@lovelykumari3486 done 😊👍🏼👍🏼
@sujoenilshahi9715
@sujoenilshahi9715 3 жыл бұрын
Sir but its not necessary to come 2 u assumer 2 1_ and 9 2 1
@SADBHAVMISSIONSAMITI231
@SADBHAVMISSIONSAMITI231 4 жыл бұрын
Can u give me brief explanation of Q1 using counting principle
@shreanshudas1104
@shreanshudas1104 4 жыл бұрын
To choose captain we have 11 options as all are equally deserving and to choose vice captain we have 10 options as 1 candidate has been already selected as captain, so final ans is 11*10=110
@RahulPatel-ld5lc
@RahulPatel-ld5lc 4 жыл бұрын
Good session sir..!!
@BYJUSExamPrepGateEseEEECINCS
@BYJUSExamPrepGateEseEEECINCS 4 жыл бұрын
Keep watching!!
@samudraladeepika2206
@samudraladeepika2206 4 жыл бұрын
Anyone can please explain the 4th answer??????
@prabhakar269
@prabhakar269 3 жыл бұрын
Excellent class sir
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