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0 votes
3.0k views
in Mathematics by (76.3k points)

Shanti has three daughters. The average age of them is 15 years. Their ages are in the ratio 3 : 5 : 7. The age of the youngest daughter is (in years)

(A) 8 

(B) 9 

(C) 10 

(D) 12

1 Answer

+1 vote
by (65.8k points)
selected by
 
Best answer

Correct option: (B) 9

Explanation:

Let ages be 3x, 5x and 7x

 Age of youngest daughter = 3 × 3 = 9

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