Question

On a round table 20 of differnt countries have to be seated ,then find the no. of ways in which they can be seated if no 2 particular persons are seated together?

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pls explain with all possible reasons and logic

Answer 1

$\huge{Hey Mate!!! }$

There are 20 empty spaces and 20 countries or elements. so we can ll the rst space in 20 ways. the second space can be lled in 20-1=19 ways. as the rst country can not be repeated. this goes on in the sequence -- 20, 19, 18, 17............. ,3, 2, 1. and hence the numver of combinations is 20! 

Cheer!!!!!!!!!!!

Answer 2

Hey mate here is ur answer......

There are total 20 elements in number...so the rst space can be set in 20 ways...

The second place can be set as 20- 1 =19...
And therefore it will go through all the numbers in the likewise sequence ....

So the answer is 20 as it can be set in 20 ways.

Hope it helps♥♥♥