Latest TCS Aptitude Question SOLUTION: In the library, there are 10 tables, 4 chairs per table. in each table there are different numbers of people seated. how many ways they will sit in the library so that no chairs wo

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(#M40002144) TCS Logical Reasoning question Keep an EYE

In the library, there are 10 tables, 4 chairs per table. in each table there are different numbers of people seated. how many ways they will sit in the library so that no chairs would be blank?

Solution

According to the given condition question is wrong

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Asked In TCS X22 (12 years ago)

Solved Read Solution (10)

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Read Solution (10) :

vamsi krishna reddy  (12 years ago)

10 tables.each has 4 chairs.
for each table different number of people are sat,so first table 1person,second table 2persons,third table 3persons,4th table 4persons.
so people means(1+2+3+4) so 4 tables are filled so 10-4=6 reading tables does not have single reader.

Is this solution Helpfull? Yes (38) | No (32)  

addanki sravan  (11 years ago)

To my knowledge question should be asked as "how many ways they will sit in the library so that no chairs would be blank in a table?" at the end. Then the answer will be
'7' which is there in the options.
At first chance single person to sit in the table in 10 ways(10 will be there)
For second chance two person must be seated(as different members must be seated) so no of ways they can sit is 9 (1 table will already be filled)
For third chance 3 person must be seated and they will be left with 8 options
Finally 4 members( which is our required condition)they will be left with 7 tables (so they can be seated in 7 ways)
Note: Answer for this can also be 8,9,10 if we don't follow order in filling tables . But 7 is precise to this question

Is this solution Helpfull? Yes (8) | No (3)  

vasumathi  (12 years ago)

maximum possibility is 4.....
so the answer is 6.

Is this solution Helpfull? Yes (7) | No (10)  

gurusha  (12 years ago)

how msny ways they can sit...mean simple, there r 4 chair...
1st tabl 4 pepl...2nd 3 ppl...3rd tabl 2 ppl...4th 1 ppl.... so

4ways

Is this solution Helpfull? Yes (6) | No (16)  

yogesh  (12 years ago)

10c4 that is 210 ways

Is this solution Helpfull? Yes (6) | No (26)  

sourav  (12 years ago)

no of people can be sited in one table in 4! ways...
so to be sit in 10 tables (4!)^10

Is this solution Helpfull? Yes (4) | No (10)  

ananth  (12 years ago)

there is 10members.
so there is 2 way that they will sit in the library without blank chair.
ans is 2.

Is this solution Helpfull? Yes (4) | No (4)  

Srishti  (12 years ago)

Since no chair has to b left blank,no of ppl-->40.
40 ppl to be seated around 10 tables can interchange their places around the table as well as across the table.
Across the table-(as the ppl have to be arranged and not selected, permutation should be used): 40 P 10
Around the table-4!
Ans: 40P10*4!

Is this solution Helpfull? Yes (4) | No (4)  

nikhil kumar  (9 years ago)

THE question is right but maybe not answers
becoz 4,3,2,1 can be placed but to get all ways of doing this we have to get value of 10c4 and then arrange all of them

Is this solution Helpfull? Yes (4) | No   

srini  (7 years ago)

7 distinct values is 381

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