Two identical pack of cards A and B are shuffled throughly.
One card is picked from A and shuffled with B. The top card
from pack A is turned up. If this is the Queen of Hearts,
what are the chances that the top card in B will be the King
of Hearts?



Two identical pack of cards A and B are shuffled throughly. One card is picked from A and shuffled ..

Answer / guest

52 / 2703

There are two cases to be considered.

CASE 1 : King of Hearts is drawn from Pack A and shuffled
with Pack B

Probability of drawing King of Hearts from Pack A = 1/51 (as
Queen of Hearts is not to be drawn)

Probability of having King of Hearts on the top of the Pack
B = 2/53

So total probability of case 1 = (1/51) * (2/53) = 2 / (51 *
53)

CASE 2 : King of Hearts is not drawn from Pack A

Probability of not drawing King of Hearts from Pack A =
50/51 (as Queen of Hearts is not to be drawn)

Probability of having King of Hearts on the top of the Pack
B = 1/53

So total probability of case 2 = (50/51) * (1/53) = 50 / (51
* 53)

Now adding both the probability, the required probability is

= 2 / (51 * 53) + 50 / (51 * 53)

= 52 / (51 * 53)

= 52 / 2703

= 0.0192378

Is This Answer Correct ?    3 Yes 0 No

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