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.
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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
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