Problema Solution
you have 8 pennies in your pocket dated, 1972, 1978, 1979, 1985, 1989, 1991, 1993, and 1995. You take the coins out of your pocket 1 at a time. What is the probablility that they are taken out in order by date.
Answer provided by our tutors
We are considering the event: drawing coins out of the pocket 1 at a time.
There is only 1 event when the coins are taken out in order by date.
The total number of events is: 8! = 8*7*6*...*2*1
The probability that they are taken out in order by date is:
P(coins taken out in order by date) = 1/8!
P(coins taken out in order by date) = 1/40320
P(coins taken out in order by date) = 0.0000248 or 0.00248%