Latest TCS Aptitude Question SOLUTION: mr and mrs smith had invited 9 of their friend and their spouses for party at wiki beachresort.the stand for group photograph if mr smith never stand next to mrs smith then how man

• Placement Papers
• /
• TCS

TCS Question Papers: TCS Interview Experience(90) TCS Company Profile

(#M40010936) TCS question unsolved Keep an EYE

mr and mrs smith had invited 9 of their friend and their spouses for party at wiki beachresort.the stand for group photograph if mr smith never stand next to mrs smith then how many way group arrange in row(A)20!(B)19!+18!(C)18*19!(D)2*19!

Asked In TCS jasveer (11 years ago)

Unsolved Read Solution (5)

Is this Puzzle helpful?   (13)   (2) Submit Your Solution

Read Solution (5) :

Raj  (11 years ago)

simplest... ans is 18*19!
method ..: mr and mrs smith never b together so out of 20(with both them) 19 can b any place so total = 19!
also 1 of them can stand with other so 18 places /..
so total is 18*19!..

Is this solution Helpfull? Yes (46) | No (7)  

Akash Soni  (11 years ago)

19!*18
bcoz along with mr and mrs smith can be arranged in 19!*2 (2 bcoz of mr and mrs smith arrangement) all together can be arranged in 20! ways so no mr and mrs smith can be arranged in 20!-19!*2 =19!*18

Is this solution Helpfull? Yes (35) | No (2)  

viresh  (11 years ago)

20!-(19!*2)
total possibility minus they will be together

Is this solution Helpfull? Yes (16) | No (3)  

Arnab  (7 years ago)

Total People: 20
Number of arrangement possible: 20!
Mr. and Ms. Smith can be together in 19!*2! cases.
Because If they stay together we can consider two of them as a single element. So, 19! ways and they themselves can be arranged in 2! ways among themselves. so, 19!*2!.

So, number of cases they will not be together is 20! - 2!*19! =20!- 2*19! = 18*19!

Is this solution Helpfull? Yes (2) | No   

B.Nikitha  (8 years ago)

total possible ways are 20!
the no of ways in which mr and mrs smith sit together is 2*19!
so 20!-(2*19!)=18*19!

Is this solution Helpfull? Yes (1) | No (1)  

Please Login to Read Solution.