Question

In a manufacturing plant, there is a 2% chance that a stamp will be placed on a box upside down. The plant shipped 30 boxes today. What is the probability that at least 2 of the boxes have an upside-down stamp?

Answer 1

look at the complement

Answer 2

if the stamps are place independently...then this problem follows a binomial distribution.

Answer 3

This is 1 - (BinomialDistribution(30, 0.02; 0) + BinomialDistribution(30, 0.02; 1))

Answer 4

or 0.1205