Answer
$\frac{10}{13}$
Work Step by Step
We know that $probability=\frac{\text{number of favourable outcomes}}{\text{number of all outcomes}}$
The total number of cards (the number of all outcomes) is $52$
There are $12$ face cards ($3$ in each of the $4$ suits), thus there are $52-12=40$ non-face cards, which are the "good outcomes".
Hence the probability here is: $\frac{40}{52}=\frac{10}{13}$
