For a group of n people, k of whom are of the same sex, the (n-k)/n expression yields an index for a certain phenomenon in group dynamics for members of that sex. For a group that consists of 25 people, 8 of whom are females, by how much does the index for the females exceed the index for the males in the group? Choose the correct choice:
A) 0.05
B) 0.36
C) 0.2
D) 0.25
E) 0.6
Index for females = (25-8)/25 = 17/25= 
<gadget id="calculator">17/25</gadget>
<output>17/25 = around 0.68</output>
0.68   Index for males= (25-17/25 = 8/25= 
<gadget id="calculator">8/25</gadget>
<output>8/25 = around 0.32</output>
0.32   Index for females exceeds males by   0.68 - 0.32= 
<gadget id="calculator">  0.68 - 0.32</gadget>
<output>0.36</output>
0.36   Answer: 0.36
<result>B</result>
For a group of n people, k of whom are of the same sex, the (n-k)/n expression yields an index for a certain phenomenon in group dynamics for members of that sex. For a group that consists of 25 people, 8 of whom are females, by how much does the index for the females exceed the index for the males in the group?