## saifoo.khan 3 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?

1. saifoo.khan

@satellite73

2. anonymous

i bet you can do this

3. saifoo.khan

I forgot.

4. saifoo.khan

I know we will make something equal to 2/3 and suppose the cards as x.

5. 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 $\frac{15+x}{65+x}=\frac{2}{3}$

6. saifoo.khan

7. ParthKohli

Okay. Sorry to interfere :)

8. saifoo.khan

I got my memory back! :D

9. saifoo.khan

number/TOTAL !!

10. anonymous

whew! you had me worried for a second

11. saifoo.khan

;D