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The average age of Nitika and Kruti is 21 years. The ratio of their ages is 4 : 3 respectively. What is Kruti?s present age ?
- A18 years
- B24 years
- C26 years
- D16 years
Answer not set
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Solution
Let the age of Nikita and Kruti be 4x years and 3x years respectively
According to given condition
$\frac{7x}{2}$ = 21
x = 21 $ \times \frac{2}{7}$
x = 6
Kruti's present age = 3x =18 years
Let the age of Nikita and Kruti be 4x years and 3x years respectively
According to given condition
$\frac{7x}{2}$ = 21
x = 21 $ \times \frac{2}{7}$
x = 6
Kruti's present age = 3x =18 years