fifteen persons among cohom are A and B
sit down at a round
table. The probabilit
that there
are 4 persons between A and B a
Answers
Answered by
3
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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