X1 X2 Y

1 1 0

1 2 1

2 1 1

2 2 0

2 3 1

3 3 1

Consider the above table of 6 observations. Values of X1 and X2 are used to predict the outcome Y. When Y is 1 the outcome is considered to be positive.

What is the Gini impurity of the given data set?

Need step by step explanation