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Answer
Success!
Decimal probability = 2.4625E-6

↓Steps Explained:↓

In a standard 5-card poker hand for 1 deck:

Calculate P(Choose Your Hand)

Choose Your Hand Hands

Calculate the probability of drawing a AKKQJ

Calculate Total 5 Card hands

Choose 5 cards from 52 cards

Total Hands  =  52!
  (52-5)! * 5!

Total Hands  =  52!
  47! * 5!

Total Hands  =  (52 * 51 * 50 * 49 * 48) * 47!
  47! * (5 * 4 * 3 * 2 * 1)

Cancelling the 47!, we get:

Total Hands  =  311,875,200
  120

Total Hands = 2,598,960

Build Probability

Calculate the probabilty of each card

Calculate the probability of drawing Ace

Calculate the probabilty of each card

There are 4 A cards in the deck

There are 52 total cards in the deck

Probability of drawing A  =  4
  52

Calculate the probability of drawing King

Calculate the probabilty of each card

There are 4 K cards in the deck

There are 51 total cards in the deck

Probability of drawing K  =  4
  51

Calculate the probability of drawing King

Calculate the probabilty of each card

There are 3 K cards in the deck

There are 50 total cards in the deck

Probability of drawing K  =  3
  50

Calculate the probability of drawing Queen

Calculate the probabilty of each card

There are 4 Q cards in the deck

There are 49 total cards in the deck

Probability of drawing Q  =  4
  49

Calculate the probability of drawing Jack

Jack

There are 4 J cards in the deck

There are 48 total cards in the deck

Probability of drawing J  =  4
  48

Calculate final probability:

Since each card draw is independent

Multiply each of our 5 card draws

P(AKKQJ)  =  4 x 4 x 3 x 4 x 4
  52 x 51 x 50 x 49 x 48

P(AKKQJ)  =  768
  311875200

Reduce top and bottom by 384

GCF = Greatest Common Factor

P(Choose Your Hand)  =  768
  311,875,200

GCF for 2 and 812175 = 384

P(Choose Your Hand)  =  2
  812,175

Final Answer

Decimal probability = 2.4625E-6
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