saifoo.khan
In a box of tickets,there are 50 blue tickets and 15 red tickets.after a certain number of red tickets are added to the box,the probability of randomly choosing a red ticket is 2/3.how many red tickets were added to the box?
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saifoo.khan
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@satellite73
anonymous
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i bet you can do this
saifoo.khan
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I forgot.
saifoo.khan
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I know we will make something equal to 2/3 and suppose the cards as x.
anonymous
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add \(x\) red ones so you have a total of \(x+15\) red and \(65+x\) in the box
ratio of red to total is
\[\frac{15+x}{65+x}=\frac{2}{3}\]
saifoo.khan
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@satellite73 is already helping, thanks.
ParthKohli
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Okay. Sorry to interfere :)
saifoo.khan
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I got my memory back! :D
saifoo.khan
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number/TOTAL !!
anonymous
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whew! you had me worried for a second
saifoo.khan
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;D