The village of Utopia

In the village of Utopia live 100 inhabitants
25 are male and 75 are female
20 are black and 80 are white
10 are young and 90 are old
40 are fat and 60 are thin
8 are both black and young
5 are both black and male
7 are both young and male
7 are both young and fat
24 are both fat and man
17 are both fat and black

a) If you see black young person in the street, what are the odds of him being a male
b) I am thin, young , white male- How many fat, old black female I can find in the village to discuss our differences