Question

In: Statistics and Probability

Here is a table showing all 52 cards in a standard deck. Face cards Color Suit...

Here is a table showing all

52

cards in a standard deck.

Face cards
Color Suit Ace Two Three Four Five Six Seven Eight Nine Ten Jack Queen King
Red Hearts

A

2

3

4

5

6

7

8

9

10

J

Q

K

Red Diamonds

A

2

3

4

5

6

7

8

9

10

J

Q

K

Black Spades

A

2

3

4

5

6

7

8

9

10

J

Q

K

Black Clubs

A

2

3

4

5

6

7

8

9

10

J

Q

K

A card is drawn at random from a standard deck. That card is not put back in the deck, and a second card is drawn at random from the remaining cards in the deck.

What is the probability that both of the cards are hearts?
Do not round your intermediate computations. Round your final answer to four decimal places.

Solutions

Expert Solution

A card is drawn at random from a standard deck. That card is not put back in the deck( i.e. without replacement),and a second card is drawn at random from remaining cards in the deck.

What is the probability that both cards drawn (without replacement) will be Heart?

P( Both are Hearts) =P ( First card is a Heart) *P ( Second card is a Heart)

There are 13 Hearts cards and a card selected at random 52 cards.

P ( First card is a Heart) =

There are 12 Hearts cards left in the deck if one is pulled and not replaced, and 51 total cards remaining.

P ( Second card is a Hearts)=

P ( Both cards are Hearts)=

P ( Both cards are Hearts) =0.05882

2) Alternative Method

There are 52 cards in standard deck and 13 Hearts cards in the deck .

If two cards drawn without replacement from the standard deck of 52 cards. The possible number of ways is:

n= 52C2

We here find out the probability of both the cards is Hearts .There are the 13 Hearts cards therefore 2 cards selected without replacement from the 13 cards is:

m = 13C2

P ( Both cards are Hearts)

=

= 13C2 / 52C2

= 0.05882

The probability of both the cards is Hearts is 0.05882.



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