Question

each man dances with 3 women, each women dances with 3 men. among each pair of men they have exactly two women in common. find the no. of men and women.

Answer 1

4 men and 4 women

Man 1- Woman 1, w2, w3

Man 2- Woman 1 w2 w4

Man 3- Woman 3 w4 w1

Man 4- Woman 2 w4 w3