What is the probability that 4 aces appear together when a pack of 52 cards is shuffled completely?

What is the probability that 4 aces appear together when a pack of 52 cards is shuffled completely?

The denominator is 52! i believe. The number of ways to arrange 52 cards. The numerator I'm not 100% on. If we consider all four aces to be one fixed element then we have 48 non-ace cards and one unit of 4 aces stuck together. Then we have 49! as the numerator. So I got 49!/52!. Is this on the right track. There is no answer in the back of the book for this problem. Thanks!

What is the probability that 4 aces appear together when a pack of 52 cards is shuffled completely?

level 1

You're close. Also the aces can appear in any of 4! orders, so 49!*4!/52!

level 2

· 3 yr. agoCollege Instructor/M.S. Mathematics

I got the same answer however I thought of it as: (4/52) * (3/51) * (2/50) * (1/49) is the probability of the 4 aces being the first 4 cards but there are 49 ways the aces could be together (1 - 4, 2 - 5, 3 -6, ......., 49 - 52).

level 1

· 3 yr. ago · edited 3 yr. agoNew User

49(4!)(48!)/52!

There are 49 ways to place the set of aces in the deck.

Edit: 1.8x10-4

level 1

You almost got it, but don't forget that the access are different so they have an order too, so that would multiply by 4!

$\begingroup$

A deck of 52 cards is shuffled thoroughly. What is the probability that the four aces are all next to each other?

What I tried

To choose the first ace I took $ \left( \begin{array}{c} 13 \\ 4 \\ \end{array} \right)/\left( \begin{array}{c} 52 \\ 4 \\ \end{array} \right)$

Is my working correct. Could anyone explain. Thanks

What is the probability that 4 aces appear together when a pack of 52 cards is shuffled completely?

peterh

2,6196 gold badges21 silver badges37 bronze badges

asked Aug 24, 2015 at 16:46

$\endgroup$

2

$\begingroup$

We have $52!$ different shuffles. The aces have $4!$ and the others have $48!$ different permutations. Now, we insert the aces somewhere into the permutations of the others as 1 card, we have $49$ places to to that (before the first... after the last), thus the answer is $$\frac{49\cdot48!\cdot4!}{52!}=\frac{24}{50\cdot51\cdot52}$$

answered Aug 24, 2015 at 16:53

Ákos SomogyiÁkos Somogyi

1,7278 silver badges17 bronze badges

$\endgroup$

1

$\begingroup$

Possible positions for a stack of 4 aces in the {interstices + ends} of the 48 other cards = 49 against total possible positions for aces of ${52\choose 4}$

$$\text{Probability} = \frac{49}{52\choose 4} = \frac{1}{5525}$$

answered Aug 24, 2015 at 18:32

true blue aniltrue blue anil

31.6k4 gold badges25 silver badges48 bronze badges

$\endgroup$

$\begingroup$

For the whole deck there are 52! permutations.

In how many of these the four aces stick together:
Since the aces are supposed to appear in a row, we need locate only the first ace as we check the cards in the order they appear in the deck. This may be the top card, the next, and so on, until the 49th. After fixing this, the four aces can still permute among themselves in 4! ways and so can the non-aces (in 48! ways). So, the probability is: $$ \frac{(49\cdot4!)\cdot48!}{52!}=\frac{24}{50\cdot51\cdot52} $$

answered Aug 24, 2015 at 17:02

What is the probability that 4 aces appear together when a pack of 52 cards is shuffled completely?

Shashi DwivediShashi Dwivedi

3011 gold badge2 silver badges8 bronze badges

$\endgroup$

What is the probability you draw 4 aces from a deck of 52 cards?

Explanation: There are 4 aces in the 52-card deck so the probability of dealing an ace is 4/52 = 1/13. In a 5-card hand, each card is equally likely to be an ace with probability 1/13. So together, the expected number of aces in a 5-card hand is 5 * 1/13 = 5/13.

What are the odds of 4 aces in a row?

The number of outcomes that have four aces in a row is 4! Save this answer. Show activity on this post. The correct answer to the question posed is: The probability is 1.

What is the probability to get 4 ace in a deck of cards?

The chance of drawing one of the four aces from a standard deck of 52 cards is 4/52; but the chance of drawing a second ace is only 3/51, because after we drew the first ace, there were only three aces among the remaining 51 cards.

How many ways can you draw 4 aces from a deck of well shuffled cards?

Answer and Explanation: Therefore, there are 270,725 ways to draw 4 aces from a deck of cards.