(2) Answers

a) [latex]\frac{7}{20}[/latex] b) [latex]\frac{2+7}{20}=\frac{9}{20}[/latex] c) [latex]0[/latex]

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(2) Answers

a) [latex]\frac{7}{20}[/latex] b) [latex]\frac{2+7}{20}=\frac{9}{20}[/latex] c) [latex]0[/latex]

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