Question

In selecting 2 cards one at a time with replacement from pack of cards, the probability that the second card is a black card, given that the first card was a red card is

• A. $\frac{1}{13}$
• B. $\frac{1}{2}$
• C. $\frac{1}{39}$
• D. $\frac{1}{8}$

Answer 1

Answer: (B)

$\frac{1}{2}$

If first card was a red then probability of getting second card black is $=\frac{26}{52}=\frac{1}{2}$ (in a pack of 52 cards there are 26 black cards and 26 red cards)