your age is 10 and your sister big you 2 years and your sister's friend small with 3 years and your sister's her friend's sister age big with 7 years so how age of your sister's friend?????
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Explanation:
ATQ when she was 10,her sister was half of her age{10÷1/2)=5 years
Or, age difference between them is 5 years only(10–5)=5
Now she is 70 then her sister age is 70–5=65 Ans
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