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you have three $1 bills for $5 bills into $10 bills in your wallet you select a bill at random without replacing a bill you choose the second Bill to find

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poopbyourside
three $1 bills, four $5 bills, and two $10 bills.
⇒total=3+4+2=9

p($5 then $10)=p($5)×p($10 after p($5))

p($5)=49 p($10)=28=14

p($5 then $10)=49×14=19

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