 Hi and welcome to the session. Let us discuss the following question. Question says, 5 cards, the 10, Jack, Queen, King and Ace of Diamonds are well shuffled with their face downwards. One card is then picked up at random. Second part is, if the Queen is drawn and put aside, what is the probability that the second card picked up is A and Ace be a Queen. First of all, let us understand that probability of occurrence of an even T denoted by P e is equal to number of outcomes favorable to E upon total number of possible outcomes. This is the key idea to solve the given question. Let us now start with the solution. Now we are given that Queen is drawn and put aside. From these 5 cards, Queen has been drawn and put aside. Now we are left with these 4 cards. Now one card can be chosen in 4 ways from these 4 cards. So number of total possible outcomes is equal to 4. Now we have to find the probability that the second card drawn is an Ace. Now clearly we can see in these 4 cards there is only one Ace and it can be drawn only in one way. So number of outcomes favorable to an Ace is equal to 1. Now probability that second card drawn is an Ace is equal to number of outcomes favorable to an Ace upon total number of possible outcomes that is 1 upon 4. From key idea we know probability of occurrence of an even T is equal to number of outcomes favorable to E upon total number of possible outcomes. Here the event is second card drawn is an Ace. So probability that second card drawn is an Ace is equal to number of outcomes favorable to an Ace upon total number of possible outcomes that is 1 upon 4. Now this is the required answer for the A part of the given question. Now in the B part we have to find the probability that the second card picked up is a Queen. We are given that the Queen is drawn and put aside and we are left with these 4 cards. Clearly we can see these 4 cards do not have the Queen. So the second card picked up is a Queen is an impossible event and we know probability of impossible event is equal to 0. So we can write probability that the second card is the Queen is equal to 0. So our required answer for the B part is probability that the second card picked up is a Queen is equal to 0. So this is our required answer. This completes the session. Hope you understood the solution. Take care and have a nice day.