Скачать или смотреть Permutations with Repeated Letters | How Many Ways Can HEEDED Be Arranged? - SAT, ACT Math

In this video, we tackle a classic permutations problem:
How many ways can the letters of the word HEEDED be arranged?

We’ll break it down step-by-step, using simple explanations so you fully understand how to handle:
Repeated letters in permutations
The formula for permutations with repetitions
Tricks to avoid common mistakes


📚 Exam Boards & Contests Covered:
SAT Math, AP Calculus AB/BC, AP Statistics
ACT Math section
GRE Quantitative, Praxis Math
AMC, AIME, USAMO
Math Olympiad training
GCSE & A-Level Math
Hosts most Canadian math contests
North American math competitions
NABTEB – Technical & Commercial Mathematics
JEE Mains & Advanced (Engineering Math)
International Math Olympiad (school level)
National-level math training and testing
MTAP (Math Teachers Association of the Philippines) – National contests
Various math exams for engineering students
National Senior Certificate (NSC) Math
Math competitions & curriculum development
AMC (Australian Maths Competition), Olympiads
O-Level & A-Level Math
Gaokao (National College Entrance) – Rigorous Math section
Chinese Math Olympiad (CMO) – IMO feeder
Mathematics Certification Institute of Japan – Suuken (Math Kentei)
Worldwide private math program
Singapore Math / Marshall Cavendish Education – Curriculum with international reach
Advanced Olympiad math curriculum and contests


🌍Global Math Topics:
Whole Numbers, Integers, Fractions, Decimals, Percentages, Ratios and Proportions, Order of Operations, Estimation and Rounding, Prime Numbers, Factors, Divisibility Rules, LCM, HCF, Standard Form, Significant Figures, Algebraic Expressions, Simplification, Expansion, Factoring, Linear Equations, Quadratic Equations, Simultaneous Equations, Inequalities, Algebraic Fractions, Substitution, Functions, Relations, Exponents, Laws of Indices, Logarithms, Sequences, Series, Polynomials, Rational Expressions, Points, Lines, Angles, Types of Angles, Parallel Lines, Perpendicular Lines, Triangles, Congruence, Similarity, Quadrilaterals, Polygons, Circles, Arcs, Chords, Tangents, Sectors, Constructions, Coordinate Geometry, Loci, Transformations, Theorems, Proofs, Perimeter, Area, Volume, Surface Area, Unit Conversions, 2D Shapes, 3D Shapes, Trapezium Rule, Trigonometric Ratios, Right Triangle Trigonometry, Inverse Trigonometric Functions, Non-right Triangles, Sine Rule, Cosine Rule, Area Using Sine, Radians, Trigonometric Graphs, Trig Identities, Trig Equations, Limits, Continuity, Differentiation, Tangents, Normals, Maxima, Minima, Rates of Change, Integration, Indefinite Integrals, Definite Integrals, Area under Curve, Volume of Revolution, Differential Equations, Vectors, Vector Addition, Vector Subtraction, Scalar Multiplication, Magnitude, Dot Product, Matrices, Matrix Operations, Determinants, Inverse Matrices, Solving Systems using Matrices, Data Collection, Sampling, Frequency Tables, Histograms, Mean, Median, Mode, Range, Quartiles, Boxplots, Cumulative Frequency, Standard Deviation, Variance, Normal Distribution, Z-scores, Correlation, Regression, Probability, Experimental Probability, Theoretical Probability, Tree Diagrams, Mutually Exclusive Events, Independent Events, Conditional Probability, Permutations, Combinations, Binomial Distribution, Poisson Distribution, Venn Diagrams, Set Operations, Truth Tables, Logical Connectives, Modular Arithmetic, Direct Proof, Proof by Contradiction, Mathematical Induction, Simple Interest, Compound Interest, Depreciation, Tax, Bills, Budgets, Investments, Loans, Annuities, Currency Exchange, Profit, Loss, Discount, Cartesian Plane, Graphing Linear Functions, Graphing Quadratic Functions, Graphing Exponential Functions, Graphing Logarithmic Functions, Sketching Graphs, Real-life Graphs, Graph Transformations, Graph Theory, Recursion, Networks, Algorithms, Dijkstra’s Algorithm, Combinatorics, Complex Numbers, Conic Sections, Multivariable Calculus, Vector Calculus, Linear Algebra, Group Theory, Topology, Real Analysis, Complex Analysis, Advanced Number Theory, Mathematical Modelling, ODEs, PDEs, Mathematical Proof and Logic.

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