5-digit numbers are to be formed using 2, 3, 5, 7, 9 with out repe | Filo
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Class 11

Math

Algebra

Permutations and Combinations

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5-digit numbers are to be formed using 2, 3, 5, 7, 9 with out repeating the digit. If p be the number of such numbers that exceed 20000 and q be the number of those that lie between 30000 and 90000 the p : q is

  1. 6 : 5
  2. 3 : 2
  3. 4 : 3
  4. 5 : 3
Correct Answer: Option(a)
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