If it is true that:
- some cars are fast
- some cars are red
- there are fast cars that aren't red
then it is certain that:

Question

If it is true that: 
 - some cars are fast 
 - some cars are red 
 - there are fast cars that aren't red 
 then it is certain that:

Answer

(a)  some fast cars are a different colour from red

Answer

(c)  fast cars are red

Answer

(b)  if every red car is fast, then every fast car is red

Answer

(e)  there can't be a car that isn't red and isn't fast

Answer

(d)  all fast cars aren't red

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