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Problem results

ProblemsClear skill: Inclusion Exclusion Build a practice set

COMB:9931115Among thirty labeled projects, eighteen use method A, fourteen use method B, and twelve use method C.

Inclusion ExclusionThree Set CountingMembership RegionsOverlapping IntersectionsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931116Mathematical problem title

Inclusion ExclusionSieve FormulaPointwise CancellationWeighted CountingEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931117Mathematical problem title

Inclusion ExclusionExact Membership SieveBinomial InversionIntersection TotalsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931118Mathematical problem title

Inclusion ExclusionBonferroni BoundsTruncated SieveAlternating ErrorEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931119Mathematical problem title

Inclusion ExclusionDerangementsForbidden Fixed PointsAlternating Series ErrorEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931120Mathematical problem title

Inclusion ExclusionDerangement RecurrenceCycle InsertionTwo Case BijectionEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931121Mathematical problem title

Inclusion ExclusionExact Fixed PointsRencontres CountDisjoint ClassificationEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931122Mathematical problem title

Inclusion ExclusionForbidden PositionsRook NumbersCompatible ConstraintsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931123Mathematical problem title

Inclusion ExclusionRook PolynomialDisjoint BlocksProduct RuleEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931124Mathematical problem title

Inclusion ExclusionCyclic Forbidden PositionsCycle MatchingsRook SieveEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Mixed review

COMB:9931125Mathematical problem title

Inclusion ExclusionSurjectionsOmitted ImagesLabeled FunctionsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931126Mathematical problem title

Inclusion ExclusionRequired SymbolsOptional SymbolsPartial SurjectivityEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931127Count functions from an n-element labeled set to a k-element labeled set for which every output has at least two pr…

Inclusion ExclusionMinimum Fibre SizeEmpty OR SingletonLabeled OccupancyEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Mixed review

COMB:9931128Mathematical problem title

Inclusion ExclusionEuler TotientPrime DivisibilitySieve ProductEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931129Mathematical problem title

Inclusion ExclusionCoprime PairsMobius SieveCommon DivisorsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Mixed review

COMB:9931130Mathematical problem title

Inclusion ExclusionLeast Common MultipleTruncated DivisibilityFloor CountsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931131Mathematical problem title

Inclusion ExclusionProper ColouringsEdge SieveConnected ComponentsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Mixed review

COMB:9931132Arrange n distinct objects in a row.

Inclusion ExclusionForbidden AdjacenciesDisjoint PairsBlock CompressionEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931133Mathematical problem title

Inclusion ExclusionDirected AdjacenciesOverlapping BlocksChain ComponentsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931134Mathematical problem title

Inclusion ExclusionBinary MatricesNonzero Rows And ColumnsIntersecting Zero ConstraintsEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931306Mathematical problem title

Inclusion ExclusionTriangle Free GraphsForced EdgesOverlapping TrianglesEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931308You may use this labeled-tree encoding: trees on [n] correspond bijectively to words of length n-2 over [n], and a…

Inclusion ExclusionTree LeavesMissing Code LabelsPrescribed SupportEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931343Mathematical problem title

Inclusion ExclusionIsolated VerticesLabeled GraphsVertex SieveEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

COMB:9931347Mathematical problem title

Inclusion ExclusionPrimitive WordsDivisor PeriodsPrime SieveEnumerative Combinatorics Problem Solving

Inclusion-exclusion, derangements, and surjectionsEnumerative Combinatorics · Calculation

Showing 24 of 26 matching problems.