Chhavi's father was 42 years of age when she was born while her mother was 38 years old when her brother 3 years younger than her was born. What is the difference between the ages of her parents? छवि के पिता की आयु 42 वर्ष थी जब वह पैदा हुई थी जबकि उसकी माता की आयु 38 वर्ष थी जब उसका भाई जोकि उससे 3 वर्ष छोटा है, पैदा हुआ था। उसके माता पिता आयु के मध्य अन्तर है-
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