Same chapter3 marksDifficulty: Medium
How many distinct arrangements can be made of the letters of the word ALLAHABAD?
Permutations and Combinations
3 marksDifficulty: Medium
State the fundamental principle of counting and illustrate it.
Original Khojo Papers practice question — not from a past board paper.
Answer
If one operation can be performed in m ways and, for each of these, a second operation can be performed in n ways, then the two together can be performed in m × n ways. A person with 4 shirts and 3 trousers can therefore dress in 12 ways.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The principle extends to any number of successive operations.
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