Question

Four trumpet players’ instruments are mixed up, and the trumpets are given to the players just before a concert. What is the probability that no one gets his or her trumpet back?

Answer 1

75%?

Answer 2

1/4?

Answer 3

No. The probability that they get theirs is 1/4th = 25%. The probability that they won't get their's is 75%. The probability that none of them get theirs is 0.75*0.75*0.75*0.75.

Answer 4

So i was right.

Answer 5

.316

Answer 6

You were right for one of them not getting their instrument. Not all of them not getting their instrument.

Answer 7

Grr... you're just too good

Answer 8

he deserves a medal