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Solution

From the data: Head of family: a lawyer, male. Two sons: Mukesh and Rakesh, both teachers and male. Reena, Mukesh’s wife, and Reena’s mother-in-law are females. So among the $6$ persons in the family we have: $ \text{Males} = {\text{Head},\ \text{Mukesh},\ \text{Rakesh}} \Rightarrow 3 $