you draw a card at random from a deck that contains 3 black cards and 7 red cards what is the probab

you draw a card at random from a deck that contains 3 black cards and 7 red cards what is the probability of you drawing a black card

Total cards = 3 black + 7 red
Total cards = 10

P(Black) = Black cards / Total Cards
P(Black) = 3/10 or 0.3