probability 2

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mathe25

Junior Member
Joined
Oct 13, 2011
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take 2 cards from a deck of 52
a) without replacement
b) with replacement

i have to find the probability that those 2 cards are 2 ace/
 
no im not fooling around denis :) i just need help ...
without replacement 4/32 x 3/31 = 3/248
with replacement 4/32 x 4/32 = 1/64
is it correct ???
 
mathe25 said:
no im not fooling around denis :) i just need help ...
without replacement 4/32 x 3/31 = 3/248
with replacement 4/32 x 4/32 = 1/64
is it correct ???
Click to expand...

No it is not...

Why doyou have "32" in the denominator? How many cards are there in the deck?
 
without replacement 4/52 x 3/51 = 1/221
with replacement 4/52 x 4/52 =1/476
is it correct
 
mathe25 said:
without replacement4/52 x 3/51 = 1/221
with replacement 4/52 x 4/52 =1/476
is it correct
Click to expand...
Without replacement is correct.

With replacement, you have the right formula but didn't get the arithmetic right.
 
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