A card is picked at random from a pack of 52 playing cards. Given that the picked card is a queen, the probability of this card to be a card of spade is:

$\frac{1}{4}$

The correct answer is Option (3) → $\frac{1}{4}$

No. of Queens in deck = 04 (1 from each group)

$∴\text{Probability}=\frac{\text{Favourable outcomes}}{\text{Total. No. of outcomes}}$

$=\frac{1}{4}$