If a die is rolled 4 times, what is the probability that a 3 comes up at least once?© BrainMass Inc. brainmass.com November 24, 2021, 11:08 am ad1c9bdddf
So, we need to find the probability of getting at least one 3. We can write this as the following...
Here X is the random variable equal to the number of 3's that we've rolled. However, ...
A step-by-step solution is provided, which solves the problem - if a die is rolled 4 times, what is the probability that a 3 comes up at least once. The question is answered using the probability of the compliment of the event, rather than finding this probability directly.