If I roll two dice 4 times, what is the probability of getting doubles at least once?
1 Answer
Nov 4, 2017
Explanation:
If you roll two dice, there are
So, the probability of rolling a double is
The probability of not rolling a double is
In 4 throws, 'At least one double' means there can be one, two, three, or four doubles.
This is clearer if you draw a branch diagram. For each of the four throws, there are only two outcomes we need to consider:
Either a double is thrown