The 4 aces are removed from a deck of cards. a coin is tossed and one of the aces is chosen. what is the probability of getting heads on the coin and the ace of hearts?

you have a 1/2 probability of the coin landing on heads

you have a 1/4 probability of picking the ace of hearts

1/2 x 1/4 = 1/8 probability of doing both

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.