CSAT › Quantitative Aptitude

Revision note: Permutations and Combinations

Order matters → P; not → C
AND × ; OR +
Repeats: divide by p!q!
Circle: (n − 1)!

Revision card summarising Permutations and Combinations — One-page visual summary of the key points to revise.

Source: https://upscprep.in/upsc/csat/quantitative-aptitude/permutations-and-combinations/ · UPSCPrep.in

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