Problema Solution
a poorly-run restaurant messed up one order in three. You and two people from work each eat there once this month, each of you eating there on a different day. What is the probability that this month the restaurant didn't mess up any of the orders placed by you or your two friends?
Answer provided by our tutors
The probably that the restaurant won't mess up is 2/3 (for one person)
You multiply the probability for you and each of your two other friends:
(2/3)(2/3)(2/3) = 8/27 = 0.2963
The probability that this month the restaurant didn't mess up any of the 3 orders is 0.2963.