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saifoo.khan

  • 2 years ago

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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  1. saifoo.khan
    • 2 years ago
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    @satellite73

  2. satellite73
    • 2 years ago
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    i bet you can do this

  3. saifoo.khan
    • 2 years ago
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    I forgot.

  4. saifoo.khan
    • 2 years ago
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    I know we will make something equal to 2/3 and suppose the cards as x.

  5. satellite73
    • 2 years ago
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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 \[\frac{15+x}{65+x}=\frac{2}{3}\]

  6. saifoo.khan
    • 2 years ago
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    @satellite73 is already helping, thanks.

  7. ParthKohli
    • 2 years ago
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    Okay. Sorry to interfere :)

  8. saifoo.khan
    • 2 years ago
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    I got my memory back! :D

  9. saifoo.khan
    • 2 years ago
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    number/TOTAL !!

  10. satellite73
    • 2 years ago
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    whew! you had me worried for a second

  11. saifoo.khan
    • 2 years ago
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    ;D

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