+0  
 
+15
3530
15
avatar

You draw 4 cards from a deck of 52 cards with replacement. What are the probablilites of drawing a black card on each of your four trials?

 

A. 1/2, 25/52, 6/13, 23/52

B. 1/2,1/2,1/2,1/2

C. 1/4, 1/4, 1/4, 1/4

D. 1/2, 1/4, 1/8 1/16

 Apr 11, 2016

Best Answer 

 #6
avatar+36916 
+10

If you draw a card and then REPLACE it, (as the question states)   the probability of the first and the second and the third and the fourth card draw will be black is  1/2  1/2  1/2  1/2

 Apr 11, 2016
 #1
avatar+2498 
+1

how many black card s are there ?

 

Answer is (A) you wrote it wrong

the answer should be like that if half of the card s are black :

A.1/2,25/51, 12/25, 23/49

 Apr 11, 2016
edited by Solveit  Apr 11, 2016
 #3
avatar+2498 
0

And the probability of taking all the 4 black is:

 

(1/2)*(25/51)*(12/25)*(23/49) = 0.0552220888355342 (6% chance)

Solveit  Apr 11, 2016
 #2
avatar+36916 
0
 Apr 11, 2016
edited by ElectricPavlov  Apr 11, 2016
 #4
avatar
0

No that's how it is on the quiz..

 Apr 11, 2016
 #5
avatar
0

No that's how it is on the quiz..

 Apr 11, 2016
 #6
avatar+36916 
+10
Best Answer

If you draw a card and then REPLACE it, (as the question states)   the probability of the first and the second and the third and the fourth card draw will be black is  1/2  1/2  1/2  1/2

ElectricPavlov Apr 11, 2016
 #8
avatar+2498 
0

yes if you will put it again into deck

Solveit  Apr 11, 2016
 #7
avatar
0

Are you sure??

 Apr 11, 2016
 #9
avatar+2498 
0

yes it is the most suitable choice

Solveit  Apr 11, 2016
 #10
avatar+56 
+5

The answer is B)

Because everytime you pick a card, the possibility of black is 1/2,

And you are replacing it and shuffle the deck, so yeah 1/2 possiblity again.

 

Also i want to give you a present.

 

Listen this song : AC/DC  : Back in Black

 Apr 11, 2016
 #11
avatar+36916 
0

It says ''.....probablilites of drawing a black card on EACH of your four trials"?    It doesn't say 'ALL'

 Apr 11, 2016
 #12
avatar+2498 
0

yes I understood :) , but the question is still wrong we didn t know how many black cards are there :D

Solveit  Apr 11, 2016
 #13
avatar
+5

Thanks for the help. And thanks @ AeonUniverse

 Apr 11, 2016
 #15
avatar+56 
0

You welcome, friend.

AeonUniverse  Apr 11, 2016
 #14
avatar
+5

Thanks for the help. And thanks @ AeonUniverse

 Apr 11, 2016

1 Online Users