aac271
contestada

WILL MARK BRAINLIEST IF CORRECT!!!!!!!!!!!!!!!!!!!!
How many times will the digit '3' appear if we write all whole numbers from 1 to 9999?
100 point!!!!!!!!!!!!!!!!!
(Will report if answer is not mathematical)

Respuesta :

mhanifa

Answer:

  • 4000 times

Step-by-step explanation:

The numbers from 1 to 9999 can be shown in the form of:

  • 3xyz, x3yz, xy3z. xyz3

Each of x, y, z represent the digits from 0 to 9, so 10 ways each.

For each of the forms we have:

  • 10*10*10 = 1000 ways and

Total of:

  • 1000*4 = 4000 ways

By the way this is applicable to any digit.

Max number of digits=4

Their can be 4ways to represent

Each form can repeat 3

  • (9999+1)/10
  • 1000

Total repeating

  • 1000(4)
  • 4000times