Question

Find the number of all numbers between 1000 and 10000 which have atleast one digit repeated.​

Answer 1

Answer:

a4ddgxz,

Step-by-step explanation:

strayed dsldgs

Answer 2

Answer:

I think it is a fair

Step-by-step explanation:

Answer

Correct option is

A

750−

5

P

3

−

5

P

4

Total no. of 3 digit numbers formed=5×5×5=125

Total no. of 4 digit numbers =5×5×5×5=625

∴ Total numbers between 100 & 1000 formed =750.

Total number of 3 digit numbers without repetition=

5

P

3

No. of 4 digit numbers without repetition=

5

P

4

∴ No. of numbers between 100 & 1000 with at least one repeating digit=750−

5

P

3

−

5

P

4