Math, asked by nasimmehboob, 2 months ago

how many two digit number can you make using 1 and 2(digit can be used more than 1)​

Answers

Answered by swadhagiri
7

Step-by-step explanation:

finding the 2-digit number and also it includes the arrangement of numbers.

So, we can get the number of ways to form 2-digit number from the given set by using permutation.

Here, we have 5 digits and we need to choose 2-digits.

Then, the number of 2-digit numbers formed from the given set without repetition is

5

P

2

=

(5−2)!

5!

=

3!

5!

=20

The numbers formed by repetition are {11,22,33,44,55}

∴ The number of 2-digit numbers formed from the given set with repetition =

5

P

2

+5=20+5=25

Answered by swayamprajna2006
1

Answer:

4 two digit numbers can be formed

Step-by-step explanation:

11

12

21

22

I hope it helps u

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