Q) In a pack of 52 playing cards one card is lost. From the remaining cards, a card is drawn at random. Find the probability that the drawn card is queen of heart, if the lost card is a black card.
Ans: We have 52 cards in a pack.
From the given pack of 52 cards, if 1 black card is lost, we are left with 51 cards.
Since there is only 1 queen of heart, hence favourable chances = 1
Total Number of chances = balance cards = 51
We know that the probability of drawing a card:
= 
= 
Therefore, probability of drawing queen of heart from the remaining cards is .
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