h3. Explicaţie

Pentru arborele initial:
 

Eliminam in ordine nodurile **1**: 1/3 * val [1];
Eliminam in ordine nodurile **2** , **1**: 1/3 * 1/2 * (val [2] + val [1]);
Eliminam in ordine nodurile **3** , **1**: 1/3 * 1/2 * (val [3] + val [1]);
Eliminam in ordine nodurile **2** , **3** , **1**: 1/3 * 1/2 * 1 * (val [2] + val [3] + val [1]);
Eliminam in ordine nodurile **3** , **2** , **1**: 1/3 * 1/2 * 1 * (val [3] + val [2] + val [1]);

Pentru arborele initial: 1/3 + 2/6 + 2/6 + 3/6 + 3/6 = 2
Dupa primul update: 0 + 1/6 + 1/6 + 2/6 + 2/6 = 1

1/3 + 2/6 + 2/6 + 3/6 + 3/6 = 2

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