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