Elitmus
Exam
Numerical Ability
Probability
There are 9 players including Mic and Jordan standing in a row. What is the probability of being 2 or less players between Mic and Jordan.
Read Solution (Total 8)
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- total no. of ways arranging 9 people is = 9factorial.
case-1--
both sit together
hence no. of ways of arranging them is 8fact*2fact.
case-2
1person sit between them
hence no. of way of arranging them is 7(2fact*7fact).
case--3
2 person sit between them
hence no. of ways arranging them is 7(2fact*6fact)
hence total no. of ways ==8!2!+7(2!7!)+6(2!7!)
divide this by 9!..
ans.. 7/12 - 11 years agoHelpfull: Yes(23) No(5)
- 7/12....
Simple one... - 11 years agoHelpfull: Yes(17) No(8)
- @prerana
the events of arranging 2 players in a row of 9= 9c2= 36
the events when there will be 2 or less players between Mic and Jordan= 21
so the probability of being 2 or less players between Mic and Jordan= 21/36 = 7/12 - 11 years agoHelpfull: Yes(5) No(8)
- @MOHIT AWASTHI the case whn 2 persons sit btw looks to be wrng...
it shd be 7p2(2fact*6fact)
- 10 years agoHelpfull: Yes(5) No(0)
- explain it properly..plz
- 11 years agoHelpfull: Yes(1) No(7)
- please explain
- 11 years agoHelpfull: Yes(0) No(7)
- why are we multiplying by 7 in case 2 and 3 i.e in 7(2fact*7fact) ?? please explain
- 8 years agoHelpfull: Yes(0) No(0)
- In case 2 :
Both Mic and Jordan with the 1person standing in between is taken as a combination and the others as 6 different arrangements.so total of 7.
this can be done in 7 different ways.so multipying it with 7 - 8 years agoHelpfull: Yes(0) No(0)
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