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Permutation and Combination
If 5 cars park in 5 parking place.there are 3 red colour car,1 blue and 1 green then how many ways we can arrange the cars differently
Read Solution (Total 12)
-
- total car=5
place =5
means cars are place any 5 position means its 5!=120
but 3 cars r red and 1 blue and 1 green
then its arrange 3!,1!,1!
so,
=120/6*1*1
=20 - 10 years agoHelpfull: Yes(30) No(0)
- TOTAL CARS= 5
RED CARS=3
TOTAL WAYS OF ARRANGEMENT= 5!/3!=20 - 10 years agoHelpfull: Yes(26) No(4)
- total number of cars = 5
five cars can be arrange among themselves in 5P5 ways i.e 5! ways
but there are three red color cars, 3 cars can arrange among them selves in 3! ways so 5!/3!= 20 - 10 years agoHelpfull: Yes(12) No(2)
- 5!=120 Ways
- 10 years agoHelpfull: Yes(4) No(17)
- If C is a liar then what he said about B is false.So, B is a truth teller.Now B's statement is based on A's statement which is true,as per which there is one truth teller and two liar.Now , B is already a truth teller.so, A and C must be lying.
But A is a truth teller( contradiction). So, then A and C must be telling truth and B is lying. - 10 years agoHelpfull: Yes(3) No(2)
- they are asking that totally how many ways the cars can be arranged if they are asking for how to arrange the red cars means 20 ways ..
they are asking totally how many ways it can be arranged so the answer will be 5!=120 ways - 10 years agoHelpfull: Yes(2) No(0)
- i think it would be (5P5/3!) i.e, 20
- 10 years agoHelpfull: Yes(0) No(1)
- 5!=120ways
- 10 years agoHelpfull: Yes(0) No(1)
- Total cars are 5.....
3 red, 1 blue and 1 green rit....
Arrangement means permutation....
-> 5!/3!*1!*1!=20 ways.....
- 10 years agoHelpfull: Yes(0) No(0)
- total no of ways 5 cars can be arranged 5! ways.
but 3 red cars are similar so their arrangement does'nt make sense bcz of similarity. therefore 5!/(3!)=20 - 10 years agoHelpfull: Yes(0) No(0)
- total car=5
place =5
means cars are place any 5 position means its 5!=120
but 3 cars r red and 1 blue and 1 green
then its arrange 3!,1!,1!
so,
=120/6*1*1
=20 - 10 years agoHelpfull: Yes(0) No(0)
- Cars = 5
Parking Space = 5
Red Cars = 3
Others = 1 each
No. of ways = 5!/3! = 20 - 10 years agoHelpfull: Yes(0) No(0)
Infosys Other Question
you meet three people, A, B and C in an island (people are either liars or truth-tellers).
You ask A:
- How many truth-tellers are among you guys?
The volcano makes a loud noise when A answers and you can't hear the answer.
So you ask B:
- What did A say? -
and B answers
- A said that one of us is a truth-teller and two of us are liars -
and then C adds
- Don't believe what B said, he's lying
.
What class of people are B and C?
Find the 8th term 0,0,6,6,20,20,42,_,_