From a deck of cards if you pick four cards, what is the probability of getting four Aces?

From a deck of cards if you pick four cards, what is the probability of getting four Aces? - চর্চা

$P(A)=\frac{4 C_{4}}{52 C_{4}}=\frac{1 \times 4!}{52 \times 51 \times 50 \times 49}=\frac{24}{52 \times 51 \times 50 \times 49}$