The average age of three boys is 15 years and their ages are in proportion 3:5:7. the age in years of the youngest boys is----------?
The average age of three boys is 15 years and their ages are in proportion 3:5:7. the age in years of the youngest boys is----------?
Explanation
The age of the three boys are =3 x, 5 x, and 7 x
3 x + 5 x + 7 x / 3 =15
15 x / 3 =15
x = 3
youngest Boy =3 × 3= 9 years
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ND22-1-2023