Numbers greater than 1000 but not greater than 4000 which can be formed with the digits 0 1 2 3 4 re...........

Quantitative Aptitude ( CCS) Permutation & Combination

Numbers greater than 1000 but not greater than 4000 which can be formed with the digits 0, 1, 2, 3, 4 (repetition of digits is allowed), are :-

350

375

450

576

Here We have 4 places to fill.

_ _ _ _

If we fill 1st place in 3 ways (with 1,2 or 3), 2nd, 3rd and 4th place in 5 ways, then

The total Number of ways are:-

3*5*5*5 = 375, which includes the number 1000, numbers greater than 1000 but less than 4000.

Here we don't require 1000, so remove it and we are now left with 374 ways. But there is a requirement to add the number 4000 here.

So we have 375 ways in total.

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