February 10, 2015

Probability of Secret PIN

Suppose everyone in the class chose a secret 3-digit PIN number. What is the probability that everyone chooses a different number? Assume there are 120 students in the class.

2 comments:

  1. Noggin NoddlebrightFebruary 11, 2015 at 9:26 AM

    The probability of no two classmates sharing a pin is precisely 0.058568541372558%. Slim indeed.

    ReplyDelete
  2. Noggin NoddlebrightFebruary 11, 2015 at 9:27 AM

    The probability of no two classmates sharing a pin is precisely 0.058568541372558%. Slim indeed.

    ReplyDelete