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The ratio of black sheep to all sheep is 2 to 7. if there are 980 sheep, how many of them are black?
 Nov 11, 2013

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Let

Number of Black Sheep = 2x
All Sheep = 7x

7x = 980
x = 140

2x = Number of Black Sheep
2(140) = Number of Black Sheep
280 = Number of Black Sheep
 Nov 11, 2013

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