The ratio of the number of men to the number of women at a concert is 5 : 3. The ratio of the number of women to the number of children is 2 : 5. Find the ratio of the number of children to the total number of women and men in the concert.
A15 : 16
B16 : 15
C13 : 12
D12 : 13
Which of the following Venn diagrams best depicts the relationship amongst "Mens, Leaders, Writers"?
i don't understand how to solve this quetion