Problem Statement
You have a bag filled with some number of red, blue and green marbles. You begin picking marbles randomly from the bag. What is the probability that the last marble you select is green?
Definition
- Class:
- MarbleBag
- Method:
- getProbability
- Parameters:
- int, int, int
- Returns:
- double
- Method signature:
- double getProbability(int red, int blue, int green)
- (be sure your method is public)
Constraints
- red will be between 0 and 100, inclusive.
- blue will be between 0 and 100, inclusive.
- green will be between 0 and 100, inclusive.
- There will be at least one marble in the bag.
Examples
1
1
1
Returns: 0.3333333333333333
The last marble is equally likely to be any of the three, so there's a 1/3 chance it's green.
0
0
100
Returns: 1.0
Since the bag only has green marbles, the last one is guaranteed to be green.
100
100
0
Returns: 0.0
3
4
5
Returns: 0.4166666666666667
63
27
48
Returns: 0.34782608695652173
100
100
100
Returns: 0.3333333333333333