Mathematics · Permutation and Combination
A university format for student roll numbers is: COLLEGE(3 digits) + YEAR(2 digits) + STREAM(2 digits) + SERIAL(4 digits). If there are 150 colleges, 5 available course years, and 25 streams, how many unique roll numbers can be created?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11,87,50,000
- 218,75,000✓
- 31,87,500
- 418,750
Correct answer
18,75,000
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