Solve for P_2
P_{2}=\frac{permutation(n+1,3)}{10}
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10P_{2}=permutation(n+1,3)
Swap sides so that all variable terms are on the left hand side.
\frac{10P_{2}}{10}=\frac{permutation(n+1,3)}{10}
Divide both sides by 10.
P_{2}=\frac{permutation(n+1,3)}{10}
Dividing by 10 undoes the multiplication by 10.
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