Ratio= 6:7 = 6+7 = 13

Total Number = 351

So...

[tex] \frac{6}{13} \times 490 = 6 \times 37.69 = 226.14[/tex]

[tex] \frac{7}{14} \times 490 = 7 \times 37.69 = 263.83[/tex]

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