question_answer 1)

A card from a peak 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 

Answer:

Let E1, E2, E3, E4 be the events that the lost card is a diamond, heard, spade and club respectively.       Let A = event of getting two diamond cards from the remaining 51 cards.             and       and P(A/E4)       Required probability = P(E1/A)