A
Gain(S,A)= Entropy (S)−i=1∑n∣S∣∣Si∣ Entropy (Si)= Entropy (S)− Entropy (S∣A)=H(S)−H(S∣A)
B
Gain(S,A)= Entropy (S)−i=1∑n∣S∣∣Si∣ Entropy (Si)= Entropy (S)− Entropy (S∣A)=H(S)−H(S∣A)
C
Gain(S,A)= Entropy (S)−i=1∑n∣S∣∣Si∣ Entropy (Si)= Entropy (S)− Entropy (S∣A)=H(S)−H(S∣A)
D
Gain(S,A)= Entropy (S)−i=1∑n∣S∣∣Si∣ Entropy (Si)= Entropy (S)− Entropy (S∣A)=H(S)−H(S∣A)