PS 2

[vaivish]

There are 5 cars in a car dealer and 5 keys. The sales person doesn't know which key is for which car. If assign 5 keys to each car, which one below is impossible as the number of cars that will have the right key?

(A) 0
(B) 2
(C) 3
(D) 4
(E) 5


Oa is D

[pepeprepa]

If 4 cars have their right key, it remains 1 key and 1 car. The key remaining is for the remaining car. In this situation 5 cars have the right key, so 4 is impossible.

[raunekk]

i didnt get this...

If 5 keys are assign to 5 cars...and if all are tried once with each..

ten at the end all cars will have their respective cars..

am i missing something..??

thx