Question

A pack of cards is counted with face downwards. It is found that one card is missing. One card is drawn and is found to be red. The probability that the missing card is red, is

• A. $\frac{12}{51}$
• B. $\frac{18}{51}$
• C. $\frac{25}{51}$
• D. None of these.

Answer 1

The correct option is C

$\frac{25}{51}$

Explanation for the correct option:

Find the probability that the missing card is red card.

The pack has $51$ cards.

Therefore, either there is one red card is missing or a black card is missing.

If a red card is missing, then total number of red cards in that pack is $25$.

Hence, the probability of the missing card is red card is$=\frac{25}{51}$

Therefore, Option(C) is the correct answer.