fifteen persons among cohom are A and B
sit down at a round
table. The probabilit
that there
are 4 persons bet

1 thought on “fifteen persons among cohom are A and B<br />sit down at a round<br />table. The probabilit<br />that there<br />are 4 persons bet”

1. Answer:

   1÷7

   Step-by-step explanation:

   Number of ways we can arrange 15 persons to sit around a round table=(15−1)!=14!

   Thus total cases=∠4!

   Fav.cases=

   13c4

   ∠4.∠2.∠9

   =

   ∠4∠9

   ∠13

   ∠4.∠2.∠9

   =13!×2!

   Thus probability=

   14!

   13!×2!

   =2÷14

   Thus probability= 1÷7

   .

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