The ratio between the present ages of Indira and Lizzy is

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The ratio between the present ages of Indira and Lizzy is 3 : 8, respectively. After 8 yr, Indira's age will be 20 yr. What was Lizzy's age 5 yr ago

1. 37 yr
2. 27 yr
3. 28 yr
4. 38 yr
5. None of the above

Correct Option: B

Let present ages of indira and Lizzy are 3k yr and 8k yr, respectively.
∴ 3k + 8 = 20 ⇒ 3k = 12
∴ k = 4
Hence, Lizzy's required age = 8k - 5
= 32 - 5
= 27 yr