Aptitude - Probability - Discussion

@Sudhanshu I also think so.

The answer is 1/26. The question is what the probability of queen of club & the king of heart. So the queen of the club is only one for that pack of cards. Similarly, the king of the heart is only one So, the total probability is 2.

2/52 = 1/26.

Not mention for club queen and king heart we can use normal method.

Two cards are a dream at random from a pack of 52 cards. What is the probability that they are king and queen?

Can anyone answer it?

For this question, I got the answer as 2/13. But how it is 1/26? I don't no please tell me.

You explained perfectly @Sonam.

@Kannan - Because we know that there is only 1 queen of club in 52 cards, here is no probability its definite so that's why we took 1+1.

Most of the people said the answer is 1/26 but they don't understand or read the question carefully. In this question, the statement is clear that a one card is drawn from 52 cards, not 26, so why they, again and again, took sample space 26?

The correct answer is 2/13. Because the probability of getting queen is 4/52 i.e., 1/13 and same for the king of heart 1/13. this is because all the 4 types in the cards have 1 king, 1 Jack, 1 Queen and 1 Ace.

So the heart have its 1 king, 1 Jack, 1 Queen and 1 Ace, Diamond have its own and same for other.

What is mean a queen of club?

Ans. is : 1/13.

n(s) = 52C1 = 52; Because we need to find the probability of getting a queen of club OR-( / ) a king of spade.
n(E) = 4C1 = 4.
n(P) = 4/52 = 1/13.

N(E) = 1C1 + 1C1 = 1 + 1 = 2.