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Mathematics 16 Online
OpenStudy (ammarah):

Find the probability of drawing the given cards from a standard deck of 52 cards. (a) with the replacement and b without the replacement A club, then a diamond

OpenStudy (ammarah):

@douglaswinslowcooper

OpenStudy (ammarah):

@tkhunny

OpenStudy (ammarah):

is it 4/52 times 13/52? idk how to do this

ganeshie8 (ganeshie8):

how many clubs are there in a standard 52 card deck ?

OpenStudy (ammarah):

4?

ganeshie8 (ganeshie8):

nope, google a bit

ganeshie8 (ganeshie8):

52 cards --- 26 reds and 26 blacks

OpenStudy (ammarah):

13

ganeshie8 (ganeshie8):

yes !

ganeshie8 (ganeshie8):

so, probability for drawing the "club" first time = 13/52

OpenStudy (ammarah):

then a diamond so i multiply 4/52?

ganeshie8 (ganeshie8):

since u have taken out one card, only 51 cards will be remaining in the deck

ganeshie8 (ganeshie8):

btw how many diamonds are there in a standard deck ?

OpenStudy (ammarah):

13/51?

ganeshie8 (ganeshie8):

yup ! 13/51 is the probability for drawing a diamond second time

ganeshie8 (ganeshie8):

so the joint probability wud be :- 13/52 * 13/51

OpenStudy (ammarah):

13/204 how about part b??

ganeshie8 (ganeshie8):

wat we did just now is part b

OpenStudy (ammarah):

then what is part a?

ganeshie8 (ganeshie8):

part a) : since we're replacing the card back into the deck, the second time u will be having 52 cards :- 13/52 * 13/52

OpenStudy (ammarah):

ohh so without replace ment it will go down

OpenStudy (ammarah):

how about for a jack, then a 7?

OpenStudy (ammarah):

a. 4/52 times 4/52

OpenStudy (ammarah):

b. 4/52 times 4/51

ganeshie8 (ganeshie8):

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ganeshie8 (ganeshie8):

you got it !!

OpenStudy (ammarah):

ok great thanks!!!

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