How many female members are there in family of ten members? Statement I: Z is only son of Y, who is son-in-law of
B. W is only daughter of
C. L is sister-in-law of P. B is brother-in-law of A, who is sister of
C. X is brother of W. L is married to
B. W is mother of P and is mother-in- law of
L. Only three married couples are there in family. A and P unmarried members of the family. Statement II: L is son of Z and is son-in-law of
X. W is only son of C, who is married to
B. R is only son of Y. B is sister of
A. P and R are siblings. L is brother-in-law of R. A and R are unmarried member of family. Y is brother-in-law of W.

We have:  X is brother of W and W is only daughter of C.  B is brother-in-law of A, who is sister of C, as A is unmarried member of family, that means B is married to C. Based on above given information we have: Clearly, only five female member are there in the family. Hence, statement I is alone sufficient. From Statement II:We have:  L is son of Z and is son-in-law of X. L is brother-in-law of R, as R is unmarried member of the family. P and R are siblings. R is only son of Y, that means X is married to Y and P is married to L. Y is brother-in-law of W.  W is only son of C, who is married to B, that means W is brother of X. B is sister of A, that means C is father of W. Based on above given information we have: Clearly, gender of A and Z is not known. Hence, statement II is not sufficient.