A couple has a son and a daughter. The age of the father is four times that of the son and the age of the daughter is one-third of that of her mother. The wife is 6 years younger to her husband and the sister is 3 years older then her brother. The mother's age is = ?

• ক 42 years
• খ 48 years
• গ 63 years
• ঘ 54 years ✅ সঠিক উত্তর