Casey has forgotten the combination to a lock. The lock has three dials with the numbers 1 , 2 , and 3 . What is the probability that the combination starts with 2 ? CLEAR CHECK How many different numbers can be made using the dials?
There are 3 different numbers that can be made using the dials: 123, 132, 213, 231, 312, and 321.
The probability that the combination starts with 2 is 2 out of the total 6 combinations, so the probability is 2/6 which simplifies to 1/3.