Quantitative Aptitude :: Problems on Ages - Discussion

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Explanation:
The average age of a woman and her daughter is 16 years.
Sum of ages = 16*2=32 years.

The ratio of their ages in 7 : 1 say 7x and x.
Then 8x = 32
=> x=4
Hence, the age of woman = 7*4 = 28 years.