saifoo.khan
  • 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?
Mathematics
schrodinger
  • schrodinger
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saifoo.khan
  • saifoo.khan
anonymous
  • anonymous
i bet you can do this
saifoo.khan
  • saifoo.khan
I forgot.

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saifoo.khan
  • saifoo.khan
I know we will make something equal to 2/3 and suppose the cards as x.
anonymous
  • anonymous
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
  • saifoo.khan
@satellite73 is already helping, thanks.
ParthKohli
  • ParthKohli
Okay. Sorry to interfere :)
saifoo.khan
  • saifoo.khan
I got my memory back! :D
saifoo.khan
  • saifoo.khan
number/TOTAL !!
anonymous
  • anonymous
whew! you had me worried for a second
saifoo.khan
  • saifoo.khan
;D

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