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  • uri

Stats : From a deck of 52 cards,a card is drawn at random.Find the probability that it is: A) a red card B) a face card C)a diamond card D) either a ten,or a queen E) a face card,or a 5,or a 4 of spade.

Mathematics
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  • uri
What? How?
no of card by total cards i hope....
yes, first find how many red cards are there in total then divide it by total number of cards P =#red cards / total # of cards

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Other answers:

imean .. as first one ... no of red cards / total no of cards ...
no of face card by total no of cards ;....
  • uri
How to find how many red cards are there?
if you know what a deck is, you will know how many red and black cards are there and how many face cards also
got to know the chart ..... if u play card ....
  • uri
-____________- I don't know? playing cards is HARAM.
http://en.wikipedia.org/wiki/Standard_52-card_deck
hmm ... neither mee but for doing the sum gota know the chart ...
red cards = diamond cards + heart cards
  • uri
@hartnn So there are always 13 red cards,hartnn? so 13/52?
there are 13 heart cards and 13 diamond cards both are considered as red so, total # of red cards = 26 P= 26/52=....?
  • uri
Wait 13 diamond,13 hearts so 26?
hope 26/52
  • uri
Lol yes got it. @hartnn
  • uri
so 26/52 =0.5
yes, 0.5 is correct :) Face cards - Jacks, Queens, and Kings are called "face cards" because the cards have pictures of their names. so, in 52, how many face cards will be there ?
note: there are total 4jacks, 4 queens and 4 kings, one of each suit.
  • uri
12/52
  • uri
12/52 is correct. how are face cards 36 in number ?
  • uri
yay so 0.230769
kk calculated ace too...
C. is simple total 13 diamonds P=... ?
  • uri
13/52
yes, correct d) there are 4 tens one of each suit same way, there are 4 queens , one of each suit P=....?
'or' means addition
  • uri
0.25 for diamond cards,and what does *one on each suit* means?
there are 4 suits in the deck hearts spades diamonds and clubs
look at the wiki link for details
so, 4 tens are 1 ten of heart 1 ten of spade 1 ten of diamond and 1 ten of club same for every other card!
can you get d) now ?
  • uri
Okay so i have a choice i can either go for *a ten* or a *queen* I go for queen so,4/52 = 0.0769
'or' in probability means we add the individual probabilities 4/52 for queen + 4/52 for a ten (4+4)/52 will be final answer for d)...just simplify
  • uri
Oh then that concept is confusing but okay *8/52?*
  • uri
0.15384
yes, 8/52 ...simplify that. same for last part just add total number of face cards + total # of 5's and total # of 4 of spade
  • uri
Face cards are 12,total 5's are 4 and spade's are 4? So,12+4+4 =20/52 =0.3846153.
there are total 4 4's one 4 of heart, one 4 of diamonds one 4 of spades and one 4 of clubs
so how many # of 4 of spades ?
  • uri
Huh? o_O 4?
Face cards are 12,total 5's are 4 <---correct there is only \(\huge 1\) 4 of spade
  • uri
*A 4 of spades?* so only 1 spade? :p
there are total 4 4's one 4 of heart, one 4 of diamonds one 4 of spades <------here , only 1 and one 4 of clubs in the question "4 of spade" is asked, which is unique in all there are 13 spades
  • uri
Don't understand :p
which part ? only '4 of spade' ? because # of faces=12 .....correct. # of 5's =4 ....correct (one of each suit) # of 4 of spade =.... ?
  • uri
I don't understand # of 4 of spade
ok, there are 13 cards in each suit A,2,3,4......9,10, J, Q, K A,2,3,4......9,10, J, Q, K of hearts A,2,3,4......9,10, J, Q, K of diamonds A,2,3,4......9,10, J, Q, K of spades A,2,3,4......9,10, J, Q, K of clubs total =52 out of this, how many '4' of spades are there ?
there's 1x ace of spades in a deck 1x 2 of spades 1x 3 of spades 1x 4 of spades ######## <---- 1x 5 of spades... etc
https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Playing_card_spade_4.svg/200px-Playing_card_spade_4.svg.png
how many of this card are there in a deck...?
EXACTLY that card...
^ only \(\huge \color {red}1\) 4 of spade, unique!
  • uri
Okay so there are always 13 spades...? :3
yes, total 13 spades but that info you don't need here
E) a face card,or a 5,or a 4 of spade. a face ---->12 a 5----->4 a 4 of spade --->1 P=(12+4+1)/52
  • uri
Okay...:) So i have a Question when there was *A face card* why we didn't use 1?
because there are in all 12 face cards one Jack of heart one Jack of diamond one Jack of club one Jack of spade total 4 jacks similarly, 4 queens and 4 kings total face cards = 12
  • uri
Oh...:D so aren't spades 13 in total? :P
yes, there are 13 spades in all A,2,3,4......9,10, J, Q, K of spades <-----total =13 what made you ask this ?
  • uri
WHY ARE WE USING 1 THEN!! THAT MADE ME ASK.. :3
1 = A
because the question doesn't ask of only spades only spades = 13 its ask for a "4 of spade" which is unique
  • uri
Okay :P so we use *1?* so face cards is 12,5's are 4 so 12+4+1/52 =17/52 =0.32692
https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcT-kzBGpMtaZYdLHrZ6Q2cyk9CyLyEvXysGlomM6aXTGfi3xql1Lw yes.
if thats blurred http://www.geeksforgeeks.org/wp-content/uploads/cards.png
  • uri
Aren't you smart? :3
O.o is that a part of the question ? (answer : P=1 :P)
  • uri
P =1? answer of what? :3
of 'Aren't you smart?' nvm if you didn't get it.......
lol
  • uri
So you mean you are *A 4 of spade smart*? :P
probability = 100%
Drawing a single card? Boring... :P
  • uri
Ha! Thanks @hartnn Bhaiya :D
always welcome ^_^

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