Covert to a common denominator to help:
A LCD is 24.
12/24, 20/24, and 15/24
So 12/24, 15/24, 20/24
Convert back into their original denominators:
1/2, 5/8, 5/6.
F.
Blinding is part of this, as the participants do not know whether they received the competitor's product.
<span>reducible.
hope this helps</span>