jee_main_2025_24_jan_morning - Permutations and Combinations Topics

Master these core formulas and structures to solve almost any past paper question.

Sample Questions in this Chapter

QUESTION #0 Divisibility Principles and Counting
The number of 3-digit numbers, that are divisible by 2 and 3, but not divisible by 4 and 9, is ________.
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QUESTION #0 Combinatorial Power Subsets and Divisibility
Let S = p₁, p₂, …, p₁₀ be the set of the first ten prime numbers. Let A = S P, where P is the set of all possible products of distinct elements of S. Then the number of all ordered pairs (x, y), x in S, y in A such that x divides y, is ________.
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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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