Answer:
The answer is 1, Hope that Helps! :)
Step-by-step explanation:
I answered first but didn't get braintlyist...ok.....
Robin’s number ------------ Y
Sydney’s number ------------ x
Y = X + 8.............. (1)
X + Y = 72 ............(2)
Substituting (1) in (2)
X + (X + 8) = 72 .............> ......2X = 64 => X = 32
Now in (1)
Y = (32) + 8 = 40
Robin is 40
Sydney is 32
There are 14 total cards and you need NOT yellow so it would be
8/14 which can be reduced to 4/7