ineedhelp1

New member
 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
 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 $$\displaystyle \mathcal{P}(E\cap F)=\mathcal{P}(F|E)\mathcal{P}(E)$$.