Simple probability questions

[RajEco]

@sonia-

You can go for basic or essential by gujrathi.
both are good and are almost same.

[Arushi :))]

@ rajeco
I mistyped it by mistake....
sorry i am. its either 53 sundays or 53 mondays

[jack]

case 1: A in 1st n B in 5th position
case 2: A in second n B in 6th
.
.
.
.
case 6:A in 6th and B in 10th

Further, A and B can interchange their position in 2!
and remaining 8 men can occupy any 8 seats in 8!
so favourable no of case 6*2!*8!

exhaustive no. of case 10!
therefore required probabilty=(6*2!*8!)/10!
ans: 2/15