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Source: — Problem Solving |
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by pemdas » Sat Feb 11, 2012 5:20 pm
apply the outer angle rule for triangles
you need to find prs-pqr? correct?

now if you look into the outer angle prs=qpr+pqr, hence (qpr+pqr)-pqr=qpr which is 30`

since both statements supply you with the same information both are Sufficient in itself.

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by GMATGuruNY » Sat Feb 11, 2012 8:35 pm
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