A card from a pack of 52 cards is lost. From the remaining cards of the pack; two cards are drawn and are found to be hearts. Find the probability of the missing card to be a heart.

A card from a pack of 52 cards is lost. From the remaining cards of the pack, two cards are drawn at random and are found to be hearts. Find the probability of the missing card to be a heart.

A card from a pack of 52 cards is lost. From the remaining cards of the pack; two cards are drawn and are found to be diamond. Find the probability of the missing card to be a diamond.

A card from pack of 52 cards is lost. From the remaining cards of pack, two cards are drawn and are found to be spades. Find the probability of the missing card to be a spade.

A card from a pack of 52 cards is lost. From the remaining cards of the pack, two cards are drawn and are found to be both diamonds. Find the probability of the lost card being a diamond.