SOLUTION: Mr.x and Mr.y enter into a railway compartment having six vacant seats.The number of ways in which they can occupy the seats is
a)25
b)31
c)32
d)30(correct)
i tried it this
Algebra ->
Permutations
-> SOLUTION: Mr.x and Mr.y enter into a railway compartment having six vacant seats.The number of ways in which they can occupy the seats is
a)25
b)31
c)32
d)30(correct)
i tried it this
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Question 1031487: Mr.x and Mr.y enter into a railway compartment having six vacant seats.The number of ways in which they can occupy the seats is
a)25
b)31
c)32
d)30(correct)
i tried it this way
Mr.x and Mr.y can be arranged among themselves in 2! ways.This can happen 6 times as there are six seats.
it means
no. of ways=2!*2!*2!*2!*2!*2!=32
but the correct answer is 30 Answer by ikleyn(52851) (Show Source):
You can put this solution on YOUR website! .
Mr.X can occupy any of 6 seats.
Then Mr.Y can occupy any of remained 5 seats.
Numbers of ways is 6*5 = 30.
