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Multiple Correct MCQ Of Permutations And Combinations, Past Year Questions


MCQ Practice Test & Solutions: Multiple Correct MCQ Of Permutations And Combinations, Past Year Questions JEE Advance, Class 11, Maths (1 Questions)

You can prepare effectively for JEE Additional Study Material for JEE with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Multiple Correct MCQ Of Permutations And Combinations, Past Year Questions JEE Advance, Class 11, Maths". These 1 questions have been designed by the experts with the latest curriculum of JEE 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 2 minutes
  • - Number of Questions: 1

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Multiple Correct MCQ Of Permutations And Combinations, Past Year Questions JEE Advance, Class 11, Maths - Question 1
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An n-digit number is a positive number with exactly n digits.Nine hundred distinct n- digit numbers are to be formed using only the three digits 2, 5 and 7. The smallest value of n for which this is possible is ?

Detailed Solution: Question 1

Distinct n digit numbers which can be formed using digits 2, 5 and 8 are 3n.
We have to find n so that 3n ≥ 900

⇒ 3n – 2 ≥ 100
⇒ n – 2 ≥ 5

⇒ n ≥ 7.
So the least value of n is 7

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