IIT JEE , AIEEE Forum - Mathematics , Algebra

arun.k.iit

THERE IS A THEATER WITH 2 ROWS EACH WITH 'n' SEATS
IF 'm' PEOPLE SIT THERE SO THAT IN THE 1ST ROW NO 2 PEARSON SITS IN ADJACENT SEATS
HOW MANY WAYS THEY CAN SIT....

pink_ele

it is

no. of ways =^m-2 P _n-2 X ^m-n P _n

amar.gupta

Dear,

there should be some condition in n and m .

otherwise it will be a lot of possibilities to fulfill the condition.

1) only one person sits in first and rest m-1 sits in 2 row.

2) two person sit in first and rest m-2 sits in 2nd row.

3) three person sit in first and rest m-3 sits in 2nd row.

............and so on.

hence please clear the relation between m and n.

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