(B) for me Stat 1
No information about Male and Female...
Take the total amount of students equal to 100.
> M : the number of male (actually it's the percentage we are looking for)
> F : the number of female
o M + F = 100
o 0.72*M + 0.8*F = 75
2 equations and 2 unknown variables.
Exactly what I had written down. I figured b/c we know .72M+.8F=75
And .28M+.2F=25 and M+F=100
Then i figured B was sufficient b/c its not looking for any real numbers here, just fraction/percentage.