# If the depth of a tree is 3 levels, then what is the size of the Tree ?

If the depth of a tree is 3 levels, then what is the size of the Tree ?

A. 2

B. 4

C. 6

D. 8

**Answer : **D. 8

## Explanation :

- You calculate the size of a tree by using the following formula: size = 2
^{depth} - If the depth is 3 levels, then the size of tree is 2
^{3}= 8