Answer: 14 men and 10 women 
Explanation:
Divide 24 ( # of students) by the sum of the ratios. 
24 divided by 7+5
24/12= 2
The ratio of men to women is 7:5
Multiply each ratio by 2. 
7x2=14 men
5x2= 10 women
Add them both together to check your answer. 
14 men + 10 women = 24 students