TCS
Company
Logical Reasoning
General Mental Ability
In the reading room of a 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 chair will be blank?
Read Solution (Total 7)
-
- Can some one explain please...
If there are 4 chairs per table and in each table there are different numbers of people seated. Then only 4 tables can be occupied with 4,3,2,1 persons and rest of 6 tables will be blank and rest of chairs will also be blank.
Pls excuse me if there is some mistake in my interpretation. - 14 years agoHelpfull: Yes(8) No(1)
- not possible.....
- 14 years agoHelpfull: Yes(3) No(2)
- there are 40 chairs so that only 40 people sit on them.
the no of ways so that 40 people sit on 40 chairs so that no chair will be blank=40p40=!40 - 14 years agoHelpfull: Yes(2) No(10)
- 1st table 1person +2nd 2+ 3rd 3+4th 4(oly possible ways to sit diff no of ppl)
so remaining 6 tables are empty - 14 years agoHelpfull: Yes(2) No(1)
- answer is 6 tables remaining
- 9 years agoHelpfull: Yes(2) No(1)
- I think it should be 240 ways.
let us not consider the chairs for a while.
talking of one table, 4 people can be arranged in 4! ways (since there are 4 chairs per table).
hence 24 ways of arranging 4 people on one table.
Now, there are 10 such tables and no seat must be empty means 10*4! = 240 ways - 11 years agoHelpfull: Yes(1) No(1)
- on every tabel 4person can sit in 4! way if there are 10tabel so no is 4!*10
- 9 years agoHelpfull: Yes(0) No(1)
TCS Other Question
Alok and Bhanu play the following min-max game.Given the expression
N=X-Y-Z
where X,Y, and Z are variables representing single digits(0 to 9).Alok would like to maximize N while Bhanu would like to minimize it.Towards this end,Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice(X,Y,Z).Alok then chooses the next value and Bhanu,the variable to substitute the value.Finally alok proposes the value for the remaining variable.Assuming both play to their optimal strategies,the value of N at the end of the game would be
a)9
b)4
c)2
d)-18
Alok and Bhanu play the following min-max game. Given the expression
N = 12 + X*(Y - Z)
where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be
1) 93
2 30
3) 12
4) -69