Question

when repetition is allowed how many numbers between 2000 and 4000 can be selected from the digits 12345​

Answer 1

Step-by-step explanation:

Since only numbers 1,2,3,4 and 5 are allowed between 2000 and 4000

Therefore no. of possibilities on thousand's place will be 2 and they are 2 and 3.

Now on hundred's place, ten's place and ones place the number of possible numbers will be 5 as 1,2,3,4 and 5.

Now the no. of possible outcome will be as follows

$2 \times 5 \times 5 \times 5 \\ = 250$

Hope this helps you.