Question

The number of four -digit numbers strictly grater than that can be formed using the digits (repetition of digits is allowed) is:

A

B

C

D

Hard

Solution

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Correct option is D)

(1) The number of four-digit numbers Strating with 5 is equal to
(2) Starting with 44 and 55 is equal to
(3) Starting with 433, 434 and 435 is equal to
(4) Remaining numbers are 4322, 4323, 4324, 4325 is equal to 4
so total number are

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