What's the probability you roll an even number on a number cube given that you've already rolled a 3?

And explain how you got it so i can understand future problems : 3

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Pls never taught i’m really confused and i rlly need