I don’t think f would have any value in this equation and f would represent 1 zero??
What u do is u divide 420 into 7 and u get 60
Largest to smallest ...
140.1 , 14.11, 14.1, 14.01, 1.401
The probability is 4/12 or 1/3
because the total of fish is 12 and the platy fish is 4 or 4 parts of the total 12.<span />