you pick a card from a standard deck of playing cards (with no jokers), do not replace it, and then pick a second card. What is the probability of picking a black card, Queen of Hearts?

total cards=52
total black cards=26
P=26/52
P=1/2
total cards=52-1=51
total Queen cards=4
total Hearths cards=13
total Queen + Hearths cards=4+13-1=16
P=16/51
therefore
The probability is equal to
P=(1/2)(16/51)