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JEE MATHEMATICS MCQ: PERMUTATIONS

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Application +4 | -1

5- digit numbers are to be formed using

2,3,5,7,9

without repeating the digits. If

p

be the number of such numbers that exceed 20000 and

\mathrm{q}

be the number of those that lie between 30000 and 90000 , then

p: q

is :

View answer and explanation

Correct option: D

5: 3

Option D (5:3) is correct because the ratio of numbers greater than 20000 to those between 30000 and 90000 is 120:72, which simplifies to 5:3.

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