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What is the value of (\binom{11}{1}+\binom{11}{0})?

Answer and explanation

Correct answer: 12

\(\binom{11}{1}\) means choosing 1 object from 11 objects, so \(\binom{11}{1}=11\). Also, \(\binom{11}{0}=1\), because there is exactly one way to choose no object. Hence, \(\binom{11}{1}+\binom{11}{0}=11+1=12\). Option 11 gives only the first term and ignores \(\binom{11}{0}\). Exam tip: Remember that \(\binom{n}{0}=1\) and \(\binom{n}{1}=n\).

Related tags

CombinationsBinomial CoefficientsClass 11 MathematicsPermutations And CombinationsBasic IdentitiesMathematicsClass 11 Mcq

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