Same chapter3 marksDifficulty: Medium
In how many ways can a committee of 3 be chosen from 10 people?
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4 marksDifficulty: Hard
How many arrangements of the letters of the word EQUATION begin with a vowel?
Original Khojo Papers practice question — not from a past board paper.
Answer
25,200
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The word has 8 distinct letters of which 5 are vowels. The first place can be filled in 5 ways and the remaining 7 places in 7! = 5,040 ways, giving 5 × 5,040 = 25,200 arrangements.
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