I have a simple question in probability which I solved in one way (I'm not $100\%$ sure It's right and I'm looking for another (more simple) way to solve it).
The ratio between the red balls and the yellow balls is $5:7$.
If there are $60$ balls overall, how much are red balls and how much are yellow balls?
Add $5+7$ you get $12$.
Now $60/12 = 5$.
now $5*5 =$ number of red balls
and $7*5 = $ number of yellow balls.
is it correct?
Do you have another way, a simple way to solve it?
Thanks in advance, Guy