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Formula Sheet

Permutations and Combinations — Formula Sheet

Telangana Open School (TOSS) · Class 12 · Mathematics

9 formulas from Permutations and Combinations (Telangana Open School (TOSS) Class 12 Mathematics) on one page, grouped by topic.

57 questions30 flashcards9 formulas & key relations5 concepts

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9 Entries · 5 Sections

Formulas and Key Relations

Fundamental Principle of Counting

m × n

Factorial Notation

n! = n × (n−1) × ... × 2 × 1

Permutations

P(n, r) = nPr = n! / (n−r)!

nPn = n!

nP1 = n

Combinations

C(n, r) = nCr = n! / (r!(n−r)!)

nCr = nC(n−r)

nCr + nC(r−1) = (n+1)Cr

Key relations

For example, 4! = 4 × 3 × 2 × 1 = 24.

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Frequently Asked Questions

What are the important topics in Permutations and Combinations for Telangana Open School (TOSS) Class 12 Mathematics?
Key topics in Permutations and Combinations include Fundamental Principle of Counting, Factorial Notation and Permutations, Combinations, Special Cases and Applications. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How many formulas are in Permutations and Combinations?
This sheet lists 9 formulas from Permutations and Combinations, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Permutations and Combinations for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 57 practice questions on Permutations and Combinations. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Permutations and Combinations

All Telangana Open School (TOSS) Class 12 Mathematics Formula Sheet

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