MathCastle
Counting & ProbabilitySuperchallengeBinomial Theorem, Pascal & Combinatorial Identities

Binomial Theorem, Pascal & Combinatorial Identities · Superchallenge problem

Evaluate ∑k=0101(k+1)(k+2)(10k)\displaystyle\sum_{k=0}^{10}\dfrac{1}{(k+1)(k+2)}\binom{10}{k}. Express your answer as a common fraction.