Adealer dealt the following cards from a shuffled deck:

3 , 2 , 2 , a , k , q , k , 5 , 2 , 6
4 , 5 , k , 2 , 7 , 6 , a , j , j , a

what was the experimental probability of dealing a black card?

can someone will give medal 8 cards are black and12 are red plesseee do i divide 20 by 8 or 8 by 20,