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help me please

ineedhelp1

New member
Joined
Mar 22, 2012
Messages
1
i need help with this:
Given a deck of ten cards numbered one through ten, what's the probability of selcting an even card, not replacing it in the deck, and then selecting five?

 

pka

Elite Member
Joined
Jan 29, 2005
Messages
7,688
i need help with this:
Given a deck of ten cards numbered one through ten, what's the probability of selcting an even card, not replacing it in the deck, and then selecting five?
Let \(\displaystyle E\) be the event that the first card is even.
Let \(\displaystyle F\) be the event that the second card is a five.

You want \(\displaystyle \mathcal{P}(E\cap F)=\mathcal{P}(F|E)\mathcal{P}(E)\).
 
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